So I have done a lot of research all over the web and discussed most details with my local forum but I am stuck between two choices on mid pipes. I turn to the larger group as there is a ton of info on sound and quality but I am interested in longevity of the BHR WITH cat. Here are my thoughts

• I like the idea of not throwing a CEL (have a series II so can't clear it) and limited smell so BHR gets a plus here
• I don't race it but may do a little track run here in there in the future. Should I be concerned with the cat blowing out?
• Its kinda pricy in comparison to the RB so the RB wins here.

any input/experience on that portion of my decision is very valuable for this week's order. Its irrelevant to my concerns but so you know I am also ordering the RB intake and header and I already have the RB cat back on. Thanks!

 

Well, I read some more and found some good post. Only one guy appears to have had an issue with the DS cat and he ran nitrous which I will not do. Most seem to claim a lesser smell with the BHR with DS cat, no CEL, and no performance difference concerns. So all that is left is the money which I can figure out from here. Any input is still very much appreciated. Thanks

https://www.rx8club.com/series-i-aftermarket-performance-modifications-23/bhr-midepipe-highflow-cat-no-211135/page2/

https://www.rx8club.com/series-i-aftermarket-performance-modifications-23/dave-sport-cat-191954/page2/

 

Um, perhaps there's some confusion. I don't see where RB offers a cat option at all. Their dual-resonated midpipe is catless. Besides being, IMO, irresponsible, catless rotaries smell bad which is for me a deal breaker by itself. I used a different metal-substrate cat, and so far, so good. The stock cat costs $1100. Even if the Davesport lives for a much shorter time, it's cheap to replace. The BHR resonator is sweet, btw.

 

Don't worry, I read the disclaimer, and I will test it for you free of charge in an NA street/AutoX/track day 8. First track event with it on should be RA in December.

If the DS fails, I hereby release Charles R. Hill and BHR from any responsibility express or implied.

Looking forward to its arrival.

 

Yeah I am all sold on the BHR DS cat route. When I posted this I was just concerned about dropping so much money on the addition of a cat if people were having issues with it like some were with the RP super cat. The money becomes a factor when you start thinking 325 for the RB with no cat to 675 for the BHR (I speaking strictly numbers and not comparing the two). I agree its more responsible to have a cat and makes sense. I did read the disclaimer on the site and I think it will cover my needs, I was just curious if others had any time tested input on their experience that's all. Thanks for the replies. I will be sure to comment on my experience.

 

for what it's worth; I've been running a davesport cat in my custom midpipe for sometime now and so far it's held up great. (far better then my former RP cat)

 

There was a recent thread with pics by someone who didn't heed this warning and tried to use it on an FI application, but apparently he deleted it. Being a single wind design the cat matrix telescoped rearward out from the center and lodged itself inside the resonator.

Plenty of people have used it NA without issue, but it is not really high flow IMO. Even though it may be 100 cpi the overall flow area (diameter) is too small. The factory cat is big for this reason. It will however work well and meet the needs of most people short of a full out race NA motor.


.

 

pretty sure Flashwing melted his when he was turbo as well.

 

I am!!! I'm only holding off because I'm waiting for your header. If you said you have cancelled plans for ever offering a header, then I would start putting together the funds to buy a mid pipe with an HJS cat. In fact, if you want to add a surcharge for the HJS to make it worth the trouble, that's fine with me.

I'm already allowing for the header and matching mid pipe being up to $1725….

 

care to share some of the leaves from your money tree?

 

Not leaves from a tree; but drops of sweat from my….

Seriously, many people in the forums spend considerably more than that on other mods. Two piece brake rotors are close to that price, for example.