which is the most Quiet aftermarket Catback?
 

I installed the exotic speed on my 8 with the midpipe and the RB header.
The sound was really great but i want to make my car more silence in case i am traveling on the high way A lot of hours
Listen to the sound that i have now here:
http://www.youtube.com/watch?v=6oTGgL6yNqA
http://www.youtube.com/watch?v=mqC5DiI1rfQ

So which is the most quit cat back?

what are you trying to accomplish with the aftermarket catback? you're pretty much just getting sound so if you want to deaden the sound, are you just looking for different tips?

I've heard the Racing Beat Catback is pretty quite.

i want the more power i can get and a little bit more deep and wankel Sound But not like 120+ db tha my car should sounds now

With an aftermarket header and midpipe on the car that you heard it? in case that the cars with aftermarket midpipes and headers are sounding louder with the same catback as a car with stock header and midpipe

You have headers...hi-flow cat...and exotic speed exhaust and are surprised that it is loud?

If you want quiet...stay stock. You won't get very a lot of hp from exhaust mods...I've done (and will do in the future) these mods for listening pleasure.

I'm guessing it is the exotic speed exhaust that is really giving you the loudness.

I noticed a measurable difference with my addition of a hi-flow cat to the stock exhaust system. It is a bit deeper and the engine feels much less restricted than before. The person I bought the hi-flow from said he had it mated with a Magna-flow and it was "way too loud". I dunno...I never heard his set-up.

You should try the stock cat-back with the headers and hi-flow cat. Probably the best way to cut out the loudness and retain as much of the benefit? I dunno...exhaust is obviously not my forte.

Good luck

Hmmm. I run a racing beat catback cut at the flange for a slip fit with a RP Supercat and a resonator. My car idles more or less silent and is only noticeably louder than stock at WOT. Even then, it's much quieter than most modded 8s (even though my cat is gutted). The key? I'm also turboed. Therefore, you should put a turbine in your exhaust to get rid of all that excess noise.

Seriously, though, even on the dyno my car is almost always the most quiet there.

I know racing beat is pretty quiet compared to other catbacks for the 8 and i believe that the mazdaspeed catbacks are pretty quiet too. Like mentioned above if you are headers and a midpipe the exhaust is going to be loud

The Mazdaspeed catback is pretty quiet.

ExoticSpeed is one of the loudest ones I've heard FYI..

The Mazdaspeed single/dual canister has one of the lowest decibel cat-backs.

Single being the lowest then the dual cat back.

Than racing beat and borla would be next on the list.

I installed a Borla and Exotic Speed High Flow catback the other day and I had to take it up to 7-8k to even get anything louder out of the exhaust.

The Borla I think is one of my new favorites.

You could always have a resonator or something welded into the exhaust to take some sound out.

I Disagree... do you happen to know the Decibels of both??

I've compared the RB next to the MS catback side by side and the RB was quieter....

heres my RB with a Midpipe:

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What midpipe were you using fix the embed link..

Fixed, thanks.


And the midpipe was a loud one... Im swapping it out the first chance i get since i dont like the quality or tone it gives.

Yep RB is quieter than the MS dual one. We've been doing some stuff on a couple of rx8s and had a chance to hear both (i own the MS). The racing beat is very quiet, mostly at cruise rpms but is heavier (performance wise).

but only by a couple pounds... a difference 99.99% of us will never feel on our street cars..

That could have been the difference the one I was referencing was using the Exotic High Flow Cat.

When i compared cat-backs i still had stock Cat.. as did my friend with the MS

Yes it sounds good much more quit than my Videos on the first post i like the sound so maybe i am going with Rev8! what about Tanabe? it says that is a quiet system? And the legamax? is louder than the REv8?

Yep but it is still a difference :)
When comparing car parts it is alway a good habit to talk about a broader spectrum of features.
If i recall it right RB's weighs more than the stock one.

I havent heard the Tananbe in person so i cant comment... but from what i read and personal experience... the RB will be the quietest around

It does, i forget the exact weights but it was only a couple pounds... I race my car and it was so little it didnt even phase me.. i made up that weight and more when i added my midpipe :)

obx=quiet

Define quiet.... by whos standards?? my friend thinks his HKS Hi-Power isnt loud, but i think its obnoxious.. also, OBX isnt known for their quality.. got any pics?

http://www.youtube.com/watch?v=nPLnP...e=channel_page
The last night with the Exotic speed Exhaust!!!!
Sounds Crazy!!!!!!

Nice sound dude. I always liked the sound of your car heh. Wtf is hjs cat? But yeah if you want quieter go RB exhaust , not sure if it will be the sound level you want , but i think its the quietest aftermarket exhaust you can get , you can also add more resonators. Or take off your headers :).

The 8 with the Exotic Speed catpipe and the Borla that Fluid was talking about was most likely mine. I switched to the Borla from the Agency Power because it was FAR too loud. I have a nice comparison of my Agency Power exhaust with the Agency Power midpipe vs the Agency Power exhaust with the Exotic Speed catpipe over on the Aftermarket Performance Modifications forum. Interesting numbers there (about 5 dBA quieter with the catpipe), so you may consider switching out your midpipe if you don't have a catpipe or a dual-resonated midpipe.

Now that I have the Borla installed I will be a new reading for it soon too, but I can tell you right now that the Borla (regardless of dBA measurements) is MUCH quieter than the Agency Power... Just food for thought though.

The HJS is an aftermarket hi flow cat made in Germany and they use in the WRC
Check it out on the google. or .www.hjs-motorsport.de

I cant change the midpipe noe because i weld on it my Hi flow cat.

you got a borla, how funny..

beers :beer:

Hard to beat this one in terms of sound http://www.rx7store.net/product_p/rx8storerx8.htm

It uses Magnaflow mufflers which give it a nice deep tone. The Racing Beat and Borla are also nice but a little to quiet.

Lol, well I hadn't personally heard how quiet the Racing Beat was, and I knew the Borla was quiet. So I stuck with an exhaust I had heard and had a pretty good recommendation for :) So thanks again for the ride!

happy to do it.

what do you have for a midpipe now??

beers :beer:

lol, 260 in a rx8....

I recall someone cut open the OE muffler early on and removed some of the packing to give it more sound.

I'm running the Exotic Speed Catpipe. It's a bit louder than your midpipe/exhaust combo, but its tolerable on the highway. It's at least enough to hold me over until I go FI.

he uses the stock catback? If i am gonna keep my stock catback i am gonna have any problem in the near future with my catalyst? what about replacing the stock tube with an other 3inches +opening the hole where the tube weld? and after the catback till the tips replacing the curve tube with some bigger? like 2.25 inches and add twi tips 4 inches? In that way i am gonna get a better flow on my stock catback and th lowest db of noise?

Just do the RB Dual Exhaust. Even with a non resonated midpipe (such at the RB midpipe) it's still not loud.

Sigh, loud is a relative term. When I was younger the Agency Power full exhaust wouldn't have been loud, now it is unbearable. This isn't a dig, its just a reminder before someone runs out on advice from someone else and makes a potentially poor decision for themselves (like I did).

Corksport is lighter than probably all the exhausts listed here and it is quiet at idle and sounds great WOT.

yes,

and it is the same as the mazdaspeed exhaust.. and is loud and drones..

if you need any more info let me know..

owned it.

beers :beer:

Yep, Swoope has it right. I have the Corksport catback. It's fine until you step on the throttle, then it gets loud. I did however, make a 18hr trip in 14hrs with it on.
The OP was driving in a tunnel and that made the exhaust louder than it normally would be.

The Corksport exhaust has been installed on my car since Feb 08 :) I know it can drone a bit but it sounds great at WOT and it light. But you guys are right it is probably not the quietest exhaust on the market :)

idk i havent heard any mention of the sp2 catback on here yet. havent heard it personally but a friend of mine had and said it was one of the quieter ones. was enough to turn me to the greddy SE. but idk you guys heard about the sp2 being quiet at all?

I had the Racing Beat & I loved it. It sounded stock at anything but WOT & sounded awesome. I then went with an RP Supercat & the RB & it still sounded really great. I switched out to a JIC Titanium (for lighter weight) but it got REALLY loud. Even after I swapped out to the stock cat it is loud.

The RB is the quietest out of all the exhausts. The Greddy is LOUD, the Corksport is really loud. The Borla is loud. Never really heard the Tanabe.

all the answers are what is in front of the cat back..

i have run a couple of different mid pipes / cat pipes. it is all there..

beers :beer:

The MS and RB are quite

Ok in front of the cat back there is an Exotic speed mid pipe with a 200cpi HJS hi flow cat weld on it and the Rb headers.
Now i go back with the stock cat back and it soynds good. but i believe that i am loosing hp From my aftermarket exhaust parts.
The rb Rev8 is gonna be too loud with the headers and the mid pipe?

You might loose or gain all of 3hp by switching exhaust parts, all you will really change is the sound

So you're saying that high-flow cat or cat delete pipe does nothing then?

He was talking about going back to the stock catback, not the cat. You wont see much at all from a catback... not much, I never said nothing

If that were the case, yeah, a high flow cat or race pipe could add some power, but nothing too serious