couldnt find this anywhere...i was just wondering how much up in hp ill get by adding a racing beat header and a high flo cat

post if you haev any idea

 

depends on the cat, do you have emissions testing there? Check out the www.racingbeat.com and look at their exhaust options. I just got the cat-replacement pipes and I'm very happy with them though it's not THAT much of a change. They say it's better to get that set than the header. Cheaper but not less gain supposedly.

 

yea we have emissions...BAH!...if we had no e check...id be running true duals with no cats.....but since we do have them...from mazdatrix i ordered a racing beat header and one of their high flo cats that have been elongated inorder to match up to the header. im just trying to figure out what kind of power gains i might get.

 

I'm planning on installing RB headers, high flow cat., and cat-back in a few days on my S4 instead of the RB header-presilencer combo. without the air pump and ACV will it muck up my high flow cat.? or is that only the stock cat. And (since my air pump and ACV are gone) should I do the presilencer instead? I'd rather get the presilencer now than have to do more exhaust work in a month if its going to clog the high flow cat.
Thanks,
-Cyrus

 

Anyone?