High Flow Cats

[RB20JT]

guys,

high flow cats? what are they all about? coz i had my 32gtst up on the hoist today...for a little squiz!! haha...anyways...and my mechanic said that i had a full 3 inch exhaust (which i know i do) but just a std cat, and that i should get a high flow cat.

So i got a few questions:

1.What r they...meaning whats the diff between std and highflow?

2.what do they do?

3. does it make the car louder?

4.what should they cost?

CHEERS GUYS!! thanks for ur help with that blitzh tuned ecu (i ditched it) LOL

[Proximity Motorsport]

they let more gasses flow out of the exhuast in turn making more power proberly not noticabull if you changed it though. just jap sell x force 3 inch stainless high flows for 160 deliverd

[RB20JT]

u wouldnt notice the power? LOL wats the point then?

[Betz]

changing from complience cat to a high flow I noticed better response, less surging at those awkward throttle postitions, less "pop's" in the exaust and a sharper power hit when it is realy being punished.

worth it imo

[SevenAngryPenguins]

I definitely felt a bit of a power increase going from stock to highflow (i got the big catco) because the exhaust flowed so well afterwards I had boost creep issues though.

[RB20JT]

hmm...thats 2/3 people so far that think they r good..anyone else? is there a specific one i should be looking for? is this xforce one any good? i have a full xforce exhaust system already, 3inch. so yer...i dunnoo

[SevenAngryPenguins]

x-force one should be fine however I believe they have ceramic substrate which doesn't last as long as ones with a metal substrate but there are plenty of people on here that claim to have had a few years of trouble free use of. think the stock cat is only like 2 or 2.5 inch too so 3 inch will flow much better

[_Ryan_]

www.justsr.com i'll be getting a 3.5" one when i get my exhaust... make sure you check that all the other brands meet the EPA requirments

[RB20JT]

thanks guys!! how do i check they meet epa requirements? emissions? or noise? im lost!!

[Cjmartz2k]

I think what he meant by you won't feel it is don't expect a big difference. Can your butt dyno feel 5-10hp?