We finally have finished our exhaust parts for the RX-8. Here is a breakdown of what we have.

3 inch stainless steel Midpipe.
http://www.rx7store.net/product_p/rx8store%20midpipe.htm

3 inch stainless steel resonated midpipe
http://www.rx7store.net/product_p/rx8store%20resonated%20midpipe.htm

3 inch stainless steel high flow cat http://www.rx7store.net/product_p/rx8store%20high%20flow%20cat.htm


Thanks
Jason

Good to hear Jason.

What is the difference b/w a "midpipe" and a "resonated midpipe"?

Will there be a significant change in the loudness?

How would it work with the new M-Speed Sport Exhaust?

I would assume then also that by adding the midpipe and the high flow cat to a freer flowing exhaust, that hp/ torque would increase?

We finally have finished our exhaust parts for the RX-8. Here is a breakdown of what we have.

3 inch stainless steel Midpipe. $199

3 inch stainless steel resonated midpipe $280

3 inch stainless steel high flow cat $345

Each system comes with bolt and gaskets and has a bung for the 02 sensor, so no need for 02 simulator.

I will have pictures shortly but these look like all the other ones on the market.

For the first few customers I will discount these items so I can get some feedback. If interested in these please call or send me an email jason@rx7store.net



Thanks
Jason


Email sent

email sent last nite. :yumyum:

Good to hear Jason.

What is the difference b/w a "midpipe" and a "resonated midpipe"?

Will there be a significant change in the loudness?

How would it work with the new M-Speed Sport Exhaust?

I would assume then also that by adding the midpipe and the high flow cat to a freer flowing exhaust, that hp/ torque would increase?

The resonated midpipe has a resonator or muffler welded in to cut down on noise. The regular midpipe is a straight pipe. It will work with any after market catback exhaust. It will allow the exhaust to flow more which adds HP/Torque.

Jason

We finally have finished our exhaust parts for the RX-8. Here is a breakdown of what we have.

3 inch stainless steel Midpipe. $199

3 inch stainless steel resonated midpipe $280

3 inch stainless steel high flow cat $345

Each system comes with bolt and gaskets and has a bung for the 02 sensor, so no need for 02 simulator.

I will have pictures shortly but these look like all the other ones on the market.

For the first few customers I will discount these items so I can get some feedback. If interested in these please call or send me an email jason@rx7store.net

Thanks
JasonSo I am assuming that you will NOT get a CEL with any of these?

As long as the 02 sensor is plugged in you shouldnt.

Jason

I've got a B&B midpipe and muffler. Your high flow cat should bolt up if I wanted to change out my midpipe right?

Im responding to all emails sent.

Thanks
Jason

I've got a B&B midpipe and muffler. Your high flow cat should bolt up if I wanted to change out my midpipe right?

Yes it should bolt up to the B&B muffler.

Jason

what's there to stop the PCM from giving a CEL if there's no cat?

also could i get one with an extra bung for an EGT sensor already welded?

im in for the 3 inch stainless steel Midpipe. $199***

***only if it is compatible with greddy exhaust.
***no cel would come out ...
As long as the 02 sensor is plugged in you shouldnt.

Jason

what do you mean by it shouldnt?
you dont know or is not going to give a cel... any testing on this midpipe
dyno...etc etc... or video how loud it is...

i will really appreciate any feedback...delivery to 78228 $$$$$$$$

Emailed you Jason. I have money waiting and ready to order as soon as you give me the info.

As long as the 02 sensor is plugged in you shouldnt.

Jason

dont think so... just not going to happen... not being a jackass just food for the brain.. on anything that doesnt have a cat...

beers

Some RX-8's have not thrown a CEL when the cat has been removed. Those seem to be the exception rather than the rule tho...

I will respond to all emails by tomorrow morning and try to get some pic up in the next day.
I will keep the discount on these open for another day. I have at least 15 people that are interested.


Jason

Jason, is the RX8 Store cat-back 3" and has it always been sold this way or did it used to have a smaller diameter?

Is there a major sound increase with this new 3" hi-flow cat? Is the resonated mid-pipe quieter than the hi-flow cat?

Do you have any before and after dyno results of the hi-flow cat?

Jason, is the RX8 Store cat-back 3" and has it always been sold this way or did it used to have a smaller diameter?

Is there a major sound increase with this new 3" hi-flow cat? Is the resonated mid-pipe quieter than the hi-flow cat?

Do you have any before and after dyno results of the hi-flow cat?

Our exhaust has always been 3 inch. The high flow cat will be a little louder than the stock cat and not much of a difference in sound from the high flo to the resonated. No dyno graphs yet.

Jason

Our exhaust has always been 3 inch. The high flow cat will be a little louder than the stock cat and not much of a difference in sound from the high flo to the resonated. No dyno graphs yet.

Thanks Jason I got the RX8 cat-back now and I just was not sure. I sent you an e-mail about the high-flow cat because I'm really interested in it.

Called Jason at rx7store yesterday and ordered mine! Can't wait to get it, once it arrives I'll take pics if none have been posted yet.

Thanks Jason, very excited!

It will go nicely with the catback you make, can't wait to get both on :mdrmed:

Very interested, pending audio

I will respond to all emails by tomorrow morning and try to get some pic up in the next day.
I will keep the discount on these open for another day. I have at least 15 people that are interested.


Jason

jason,

PICS, specs?????

beers

Sorry for the delay on the pics. Im waiting on my shipment of these that I hope will be here this week.

Jason

I just can't wait to get it :)

It is the last piece of my exhaust puzzle, and I'll finally be able to install everything at once. Jason and rx7store always seem to put out good stuff, at least from my perspective, so I'm quite excited.

I just can't wait to get it :)

It is the last piece of my exhaust puzzle, and I'll finally be able to install everything at once. Jason and rx7store always seem to put out good stuff, at least from my perspective, so I'm quite excited.
couple of quick questions....did you end up going with the high-flow cat or one of the other two? also, do you know if this midpipe comes with a hanger, since that seems to be an issue with the rp supercat?

I got the resonated midpipe. Dunno about hangers, but that's an easy fit so I didn't care enough to ask.

Im getting desperate here... i want the midpipe ... and im planning on getting k&n intake but im worried about getting CEL any one has a fix to this or EXPERIENCE

I read something on an evo forum, I think, about extending the O2 sensor bung so the O2 sensor sits out farther. This in essence takes it out of the direct exhaust stream and fix the CEL problem since it wont be reading as much unburnt fuel.

dDub, how's it looking?

Haven't received it. Last post from Jason in this thread said he was still waiting on them from the people making them, and then he'd be sending them out. I'm in no rush, I paid early to secure the GB price and to get it quicker :D

Good news. I will have these tomorrow and post some pictures.

Jason

Sweet, does that mean all the "group buy" or early/special order people or whatever will have theirs shipped out next week?

does anyone know what the stock cat weighs? How much is this new one?

Well, dDuB, seeing that you put your order in and especially seeing that Jason should have these units in hand today pushed me to also put an order in today. I went for the high flow cat. I already have the RX-8 Store cat-back.

Cool, I was wondering what the high flow cat version of the pipe would sound like versus the resonated/no-cat pipe. I also have the rx8store catback, though it is not on yet. I'm doing all the exhaust at once.

I'm interested too. I've got the Midpipe with resonator from Canzoomer but took it off because I got sick of the loud rasp and CEL from the cat delete pipe. I would so love to be able to put my exhaust back on and run the Canzoomer again. This should bolt right in place right?

I am also intrested in the high flow cat, what is the weight and sound difference? I Have a borla cat back, will it bolt right up? Thanks

3 inch stainless steel high flow cat $345
is this a rx8club price? does this include shipping? does this include the resinator?

I now have pricing and pictures on the site. Here are the links.

Racing Midpipe:
http://www.rx7store.net/product_p/rx8store%20midpipe.htm

Racing Midpipe with resonator:
http://www.rx7store.net/product_p/rx8store%20resonated%20midpipe.htm

High flow cat midpipe:
http://www.rx7store.net/product_p/rx8store%20high%20flow%20cat.htm


Jason
www.rx8store.net

Looks good, can't wait :D

will your high-flow cat pass emissions and void my warranty? :D:

Good question. We have not done any emission testing on our cat. Im sure we will have some results soon.

Jason

Good question. We have not done any emission testing on our cat. Im sure we will have some results soon.

Jason


what about some video and DYNO GHAPH...

Jason-
I'm interested in the high-flow cat... a few questions though...
Do they have metallic or ceramic elements?
Are they meant specifically for rotaries (i.e. can handle the excess heat over time)?
Does your price include gasket and bolts?

Thanks!!

Jason-
I'm interested in the high-flow cat... a few questions though...
Do they have metallic or ceramic elements?
Are they meant specifically for rotaries (i.e. can handle the excess heat over time)?
Does your price include gasket and bolts?

Thanks!!

Our cat is metallic and the whole high flow system weights in at 11 lbs.

Price does not include gaskets and bolts. You should be able to reuse the stock gaskets.

Jason

what about some video and DYNO GHAPH...

I will try to get some dyno results, but they are going to be the same as the other systems on the market. They're all 3 inch pipes so there shouldnt be much variation in numbers.

Jason

Our cat is metallic and the whole high flow system weights in at 11 lbs.

Price does not include gaskets and bolts. You should be able to reuse the stock gaskets.

Jason

Wow... that's light. Still wondering about it's longevity on the rotary (because of the heat)... I know this pipe is specific to the RX8, but has this particular cat been used on RX7's?

The cat we use on our RX7 systems is made of the same material and we have never had any issues with it. We have been selling those for years.

Jason

The cat we use on our RX7 systems is made of the same material and we have never had any issues with it. We have been selling those for years.

Jason


That's what I wanted to hear... once I get my 8 tuned and running leaner I don't want a $350 melted cat as a paperweight :)

Thanks

Is it me or is that price for a high flow cat pretty good?

By the way, what #'s are high flow cat's giving? I thought I heard 8-10HP....am I right?

Jason, are you planing on getting it emission tested? I'm not in an area that does that kind of stuff but I was just wondering.

Oh yeah, and how is the sound from the high flow cat? It's not annoying right????

Oh yeah, and how is the sound from the high flow cat? It's not annoying right????

I've been wondering about the same thing myself, but I went ahead and ordered it anyway. I figure like any other exhaust component once installed the sound will calm down over time. As soon as I know I'll write my opinions here.

once I get my 8 tuned and running leaner

G8rboy, what are you using to tune your car? Are you NA or FI?

G8rboy, what are you using to tune your car? Are you NA or FI?

Still NA for now... probably going to get a supercharger in the next year (probably the Pettit kit, but maybe the Axial Flow if it's released soon enough). I'm holding off on an ECU until I make that decision... but the Interceptor looks like the best bet right now.

Looky what I got today...

http://home.comcast.net/~ddub114/pipe1.jpg

http://home.comcast.net/~ddub114/pipe2.jpg


Resonated/catless midpipe. Looks awesome, can't wait to put it on. For those interested it weighs approximately 10.8 pounds.

Looky what I got today...

http://home.comcast.net/~ddub114/pipe1.jpg

http://home.comcast.net/~ddub114/pipe2.jpg


Resonated/catless midpipe. Looks awesome, can't wait to put it on. For those interested it weighs approximately 10.8 pounds.

Damn that's purty... looks like quality craftsmanship.

Looky what I got today...

http://home.comcast.net/~ddub114/pipe1.jpg

http://home.comcast.net/~ddub114/pipe2.jpg


Resonated/catless midpipe. Looks awesome, can't wait to put it on. For those interested it weighs approximately 10.8 pounds.
when are you planning on doing the install? you're gonna do everything at once, right? looking forward to pics/clips should you make some :icon_tup:

Maybe next weekend if things work out, but not totally sure yet.

Yah everything at once, OBX header, rx7store resonated/catless midpipe, rx7store catback. I'll get sound clips and pics when it's all done.

What, not fair. I did not get mine yet! Well, good, I'm glad you got yours then that means that my delivery should not be far behind.

That's what I wanted to hear... once I get my 8 tuned and running leaner I don't want a $350 melted cat as a paperweight :)

Thanks

Running richer will damage your cat. Not leaner.

Running richer will damage your cat. Not leaner.

Only in extreme circumstances, like after flooding it... otherwise running lean adds heat to the exhaust gases, which can melt a cat not meant for that purpose. Running richer keeps the temps lower, which is the whole reason Mazda lowered the HP ratings when the RX-8 was released in the US... they had to ensure the OEM cat would last long enough to meet US federal regulations, and is one of the reasons we're stuck with an overly rich tune. It would have cost them a fortune to put high-temp cats on, so they detuned it instead. I think the factory tune has been slightly leaned out over the last few flashes, but nowhere near optimal.

there is a god aweful amount of leaning through the curve that can be done on a N/A 8...so far the Interceptor is the only one..I think...that allows us to keep all the safety pieces controlled by the ECU intact and provide the ability to take over control and keep the PCM/ECU happy enough to achieve gains not possible with e-manage and the sort...

Cat Life < Leaner A/F

In another thread...although no one has stated this particular cat...some have experienced melting even the highflows including the SR cat...

Jason...back to Epitrocoid's question earlier...is there a way or an option to have an EGT bung placed on the pipe or did i miss that answer?

Jason...back to Epitrocoid's question earlier...is there a way or an option to have an EGT bung placed on the pipe or did i miss that answer?

We could put one in but the problem is we dont have the bungs here. They usually come with the gauge.

Jason

Wondering if anybody who has ordered one of these is retaining the OEM exhaust, or if that's even advisable. If so, please post on your results.

My credit card itches.

So who has installed one so far? first impressions? everything fit up good?

no brakets on these
pipes ?????

No brackets on the pipes.

If some customers were willing to pay more, would you include a hanger?

I just recieved the high flo cat today, it was a bummer to see no hanger with this. I paid 345 for monkey welds? For this price I expected to see better quality. :spank: Oh well, I sure hope the cat holds up. :anger:

I just recieved the high flo cat today, it was a bummer to see no hanger with this. I paid 345 for monkey welds? For this price I expected to see better quality. :spank: Oh well, I sure hope the cat holds up. :anger:
Monkey welds? The welds look pretty nifty on my midpipe... What're you talking about exactly? And 345 is a GOOD price, look at the other high flow cat midpipe options out there. RP (rx7.com) is 395 + shipping and also DOES NOT come with a hanger, and the sr motorsports high flow cat is 399 + shipping and it can't even hold up for very long. What is your beef with the pricing? It's cheaper than anywhere else...

I just recieved the high flo cat today, it was a bummer to see no hanger with this. I paid 345 for monkey welds? For this price I expected to see better quality. :spank: Oh well, I sure hope the cat holds up. :anger:


Are you a welder?

What is the facination with the hanger? Obviously if its not on there you dont need it, especially with a pipe that only weights 10 lbs.

It's cheaper than anywhere else...


I can agree with that. Looks like a fine piece to me as well.

What is wrong with this picture?

http://img525.imageshack.us/my.php?image=rx7storehighflowcat8wx.jpg

http://img525.imageshack.us/my.php?image=rx7storewelds6oh.jpg

Maybe since I Gas Tungsten Arc Weld, I have high expectations. Although I still consider this a poor MIG weld.

What is wrong with this picture?

http://img525.imageshack.us/my.php?image=rx7storehighflowcat8wx.jpg

http://img525.imageshack.us/my.php?image=rx7storewelds6oh.jpg

Maybe since I Gas Tungsten Arc Weld, I have high expectations. Although I still consider this a poor MIG weld.

I have talked with the company that makes these and Im going to send you a new one. The first pic that you show, the one with the three bolt flange should not have extra pipe sticking out. That is supposed to be on the other end with the 2 bolt side. They made a couple of these backwards and it looks like you got one. I will have fedex pick that up on tuesday. Since you are unhappy with the welds I can refund you if you dont want it. Send me an email jason@rx7store.net and let me know your full name on the order.

Thanks
Jason

I have talked with the company that makes these and Im going to send you a new one. The first pic that you show, the one with the three bolt flange should not have extra pipe sticking out. That is supposed to be on the other end with the 2 bolt side. They made a couple of these backwards and it looks like you got one. I will have fedex pick that up on tuesday. Since you are unhappy with the welds I can refund you if you dont want it. Send me an email jason@rx7store.net and let me know your full name on the order.

Thanks
Jason

Jason, I have just sent you an email about this issue. I guess I should have read this thread more. I have already removed my stock cat and have just found out that my cat has that extra piping welded in. It should go to the exhaust end. Now I'm just pissed after spending all morning trying to remove my stock cat and that I have to install it back again coz this one you sent me can't fit. I don't have the box of this item anymore, so I'm screwed.

:mad:

Send me an email with your information. I will express you a new pipe and just put the old one in box the new one will come in. I will have fedex pick that one up.

The guy that does the welding messed up on a few of these.

Jason

^ Hope you got my email yesterday and will be sending the replacement soon.

Got it and taking care of that today.

Jason

Jason - sent you a PM and an email. Heck, I even called and left a message.


Let me know what's up. Thanks.

Just replied to your PM.

Jason

Back atcha.

I have been fighting power loss for over a year. The car has been taken well care of. Bought the car in August of 2003. Getting rid of it was never an option. Taken the car to 2 different cities for other options. No luck. Called Mazda North America 2 times. The dealer does not have a clue. Waste of my time. If their is no CEL, you are going to have to take action in your own hands. If your car ever has power loss, it most likely is the CAT. If it is not the CAT, its a dirty MAF. If its not the MAF, its your spark plugs and or wires. I have installed parts little by little over time. All of my mods except for the Typhoon were purchased from Jason at Rx 7 store. I would recomend everyone looking for a solution, to call him.

Pulled my CAT off. It was BBQ. You can hear all the pieces inside that were broken. It was heating up and conducting heat all over my car. My drinks were hot. The car would go into safte mode when heat traveled back up the header to the block.

Put the midpipe on. All troubles are over. I bet my car saw 25 horsepower as soon as that midpipe was in. I have stock exhaust, and glad. No resenator on that pipe. Sounds very good. No more problems or CEL after 250 miles.

You will need an air wrech to do this, or a gorilla.

I have no idea what HP my car has, but all the mods working together give the car the power it needs.

The ACT prolite flywheel should be stock. It is easier as a daily driver than the stock one is. You can roll up to speed bumps at 1 mph, and throttle up with 0 bucking. Power is all over the place. I like the Typhoon Intake. It was very loud until the midpipe. All the back presure was comming out when CAT was clogged. Get the Racing Beat wires. It will smooth out the engine and provide more at bottom end. I am not going to Turbo the car now. I plan to go with the interceptor ECU. I think you could get 240-250 bhp easy.

pm'd you regarding midpipe ($199) shipped to 92841.

...Put the midpipe on. All troubles are over. I bet my car (#) saw 25 horsepower (http:///#) as soon as that midpipe was in. I have stock exhaust, and glad. No resenator on that pipe. Sounds very good. No more problems or CEL after 250 miles...:icon5: So your running a midpipe and no CEL has appeared yet? That is pretty good!:biggthump Are you running some sort of O2 simulator? (Which i thought do not really work well in RX-8s)

Thanks!
Edgardo

I want to know too ! How you run midpipe with no CEL.

Im buying one right now as soon as someone can give me an answer to this

pm'd you regarding midpipe ($199) shipped to 92841.
nevermind...total came out to $219.
btw, is the ID of the pipe actual 3ins? or is it something like 2.75~???

No answer's from turbine on CELs, no one else is saying much about this.

I guess no one is truly exited after getting any of this gear or it doesn't do much? Anyone know? No sound clips, no dynos, no ???. Can anyone talk about what effect the midpipe or CAT has on the car... install ease w/old gaskets?... CELs?... Driveability? ... Power?... Longevity?... Sound?.... Anything????

intake, exhaust upgrades never really does anything tp the renesis. you most likely get a cel, although it wont affect performance of the engine. sound should be a little more...if using old gaskets is an issue to you go buy a new one...i personally would just the old one....dont see problmes there....lengevity wise....it's just a metal pipe...what lengevity issues are there to consider? the reason i'm getting one is because my car will shoot 2ft flames from the muffler tip when i do a redline upshift.....LOL

no CEL period!

Get the straight pipe for sure. It will make a huge increase in power. When it hits 5k, it puts you in the seat. WOT sounds perfect. I have stock exhaust. No way I can run after market. Not loud in daily mode. Very, very pleased.

I'm running the Greddy Turbo, and when I had the CEL code pulled, it was a too rich code. I'm positive I am killing my cat. Under boost it is very rich, 10-11 afr. I know that these cats have been known to clog or have various issues of spreading heat, especially w/ the adition of a turbo to an already very hot rotary machine. I have the B&B cat back, and am interested in getting a midpipe asap. It could possibly help w/ the CEL, but my main reason is to simply add sum more power w/ better backpressure. How's that $199 one sound?

I have the resonated/catless midpipe, still no CEL. I've gone about 1-1.5k miles without one yet.

Also, with aftermarket exhaust you'd definitely NOT want the straight pipe. I have the rx8store.net catback with the midpipe, and I'm GLAD I got the resonated one. Otherwise it'd be insanely loud.

intake, exhaust upgrades never really does anything tp the renesis. you most likely get a cel, although it wont affect performance of the engine. sound should be a little more...if using old gaskets is an issue to you go buy a new one...i personally would just the old one....dont see problmes there....lengevity wise....it's just a metal pipe...what lengevity issues are there to consider? the reason i'm getting one is because my car will shoot 2ft flames from the muffler tip when i do a redline upshift.....LOL

hey i wanted to shoot flames as well. Im getting the Jic magic exhaust but i was wondering what else i need in order to shoot those flames :rock: do i need a midpipe? which one? but also i heard it'd be better to get a test pipe instead? wat would you guys say to get in order for me to OBTAIN THOSE FLAMES!! ahha i dont want something too loud as well.. juss something louder than stock but not too loud that i'll get pulled over for it.. -_-... THNX

im thinking about getting the high flow cat, but wondering whats the specs for it. its been a while since it came out, so theres gotta be some result on it. also can anybody be nice enough to post some sound clips. thanks

The resonated mid pipe is a straight through design correct? Is the center perferated at all or is it a straight through pipe with a resonating material wrapped around the pipe?

Thankx...

The resonated pipe is straight thru, no perferation. Basically a muffler welded into the midpipe.

Jason

So let me ask this. If you tested two pipes side by side, one with just a high flow cat and the other with just a resonator, how much quieter would the pipe with just the resonator be?

Is it nominal, substantial...??

Thankx for your input...

I've spent the last hour reading all of these threads, but haven't heard of any HP gains. Sounds like the resonated one would be the best fit for my Mazdaspeed catback, if I don't want it to be too loud. Also, it seems to be safe to say that no CEL will be thrown. Is this truly a worthy upgrade? Thanks for the responses.

Jason, I'm also asking you in here, so that I may be more precise: we are 2 or 3 guys interested in buying a high-flow cat, and one of the two or three we are considering is the RX8Store hfc. Could you please give me an estimation for pricing + shipping for 2-3 hfc to Athens, Greece ? You mentioned you can ship only via UPS or FedEx and that the prices are ridiculous due to size, but can you quote a ballpark figure so that we can decide ?
Thanks

So let me ask this. If you tested two pipes side by side, one with just a high flow cat and the other with just a resonator, how much quieter would the pipe with just the resonator be?

Is it nominal, substantial...??

Thankx for your input...

The resonated pipe without the cat would be quieter from my experience the high flow is just as loud as the cat delete pipe.

Anything on power gains??

hfc just as loud as the midpipe? anyone have opinions on a hfc with the ms dual can exhaust?

this thread needs videos / soundclips. C'mon guys, I'm sure a bunch of you have them.

My recent searchign has led me here... I'm thinking that in retaining as much warranty, emissions leagality, and sense of hearing, that a HFC installed on a virtually stock car is about he best $400 I could spend. Any opinions to sway me one war or the other. Essentially I'm asking, is with a stock exhaust does it get SIGNIFICANTLY louder, will I get a "noticable" gain in power and will I have no issues passing MD emmissions and having any warranty work performed? Also should I wait for the Cobb AP to lean out my A/F ratios before or concurrently to get max gains? I.E. 5 hpish from HFC alone, 10 hp ish from EMU programming and 18ish together? Does that make sense?

I know this thread ended long ago but I am buying the rx7store hfc and I was wondering if they had done any emissions testing on it? Thats the only thing I need to know. Will it pass MD emissions (or any state emissions for that matter)? I don't have a stock cat to replace this unit with so if I get it its all I will have. I know the RP highflow cat will pass a "smog test" but I don't know if thats the same as the emissions test. I need to know so if anyone can help that would be great... I will try calling the store once you west coasters wake up over there.

My recent searchign has led me here... I'm thinking that in retaining as much warranty, emissions leagality, and sense of hearing, that a HFC installed on a virtually stock car is about he best $400 I could spend. Any opinions to sway me one war or the other. Essentially I'm asking, is with a stock exhaust does it get SIGNIFICANTLY louder, will I get a "noticable" gain in power and will I have no issues passing MD emmissions and having any warranty work performed? Also should I wait for the Cobb AP to lean out my A/F ratios before or concurrently to get max gains? I.E. 5 hpish from HFC alone, 10 hp ish from EMU programming and 18ish together? Does that make sense?
I have the HFC on an RB exhaust and it does substantially change the exhaust note. Not extremely loud, just more grunt at the lower end.
As for noticable gain; probably not while driving but you might free up a few ponies on the dyno.
AP would be a great choice once you start modding your car and you know which direction you're taking with it. (ie; prioritized mod list)


I know this thread ended long ago but I am buying the rx7store hfc and I was wondering if they had done any emissions testing on it? Thats the only thing I need to know. Will it pass MD emissions (or any state emissions for that matter)? I don't have a stock cat to replace this unit with so if I get it its all I will have. I know the RP highflow cat will pass a "smog test" but I don't know if thats the same as the emissions test. I need to know so if anyone can help that would be great... I will try calling the store once you west coasters wake up over there.
Not sure on MD emissions, but I remember reading a while back that someone passed CA smog with it. (we have some pretty strict laws) Not sure if they do a visual inspection in MD and whether they'd give you shit for it.

Cool thanks Jedi. That gives me a little hope at least.

We have changed the design of our resonated midpipe a little. We went with a longer magnaflow resonator to help keep noise levels down.

I have the resonated/catless midpipe, still no CEL. I've gone about 1-1.5k miles without one yet.

Also, with aftermarket exhaust you'd definitely NOT want the straight pipe. I have the rx8store.net catback with the midpipe, and I'm GLAD I got the resonated one. Otherwise it'd be insanely loud.



I have burned my cat and will cost me 2500$ to purchase a new one in Norway....I have catless midpipe, but it gives me CEL. I hate CEL!!!

Does your midpipe still runs without CEL???

I what type of midpipe did you purchase??

Thanks for your help!

hey guys does anybody know if the high flow cat is legal? and do you need to weld it? or is it hard to install? and will I be making more noise if I only put a highflow cat and leave the stock exhaust??

I need a race pipe buy this weekend and so far you have the best price. How fast can you ship to 89117? or 89169? what ever is cheeeeeeper :)
Also I have the OBX cat back, will this just bolt right up? or do I need to have a shop install it?
Thank you for your time,
-Gilbert

hey guys does anybody know if the high flow cat is legal? and do you need to weld it? or is it hard to install? and will I be making more noise if I only put a highflow cat and leave the stock exhaust??

Dont know about "legal" but you may not pass smog ;)
Dont know if you need to weld it. I kinda just asked the samething, "If I need a shop to install it".
You will need to lift your car up, if you dont have the space or tools have it installed. If you do have the space or tools its not that hard. Realy.
You will make more "noise" stock. But not as bad if you had after market exhaust ;)

no welding is involved. you can install this with simple hand tools.

Jason, thinking about getting your high flow cat and the MS single muffler cat back; have you seen any info or testing that indicates it will pass standard fed emissions testing? How about info needing to flash ECU with these mods? Can't imagine it would make all that much of a difference to disrupt the ECU settings, but curious if anyone has needed to do this with similar mods

I have the same question as corky regarding emissions testing.

PM sent.

ok guys a few more questions to the this thread......

does anyone know if it will void my warranty if i install the high flow cat????

and is this highflow cat durable???? I don't wanna buy it and 6 months after it gets burn or somethig....

is there any increase in sound if I just install the highflow cat and leave the stock muffler???

or what do u guys think its better..... buy a midpipe and a muffler and intall it leaving the stock cat??? or the high flow cat and a muffler??

ok guys a few more questions to the this thread......

does anyone know if it will void my warranty if i install the high flow cat????

and is this highflow cat durable???? I don't wanna buy it and 6 months after it gets burn or somethig....

is there any increase in sound if I just install the highflow cat and leave the stock muffler???

or what do u guys think its better..... buy a midpipe and a muffler and intall it leaving the stock cat??? or the high flow cat and a muffler??

Midpipe without cat will not pass emissions.
I'm not sure if the high flow cat will pass emissions.

Pending the answers to our questions, street legal way to go would be high flow cat & muffler, off road use way to go is midpipe.

does the '3 inch stainless steel high flow cat' fit perfect with the JIC exhaust? also how much is it in total including shipping to Sydney, 2125 Australia.