jeffbrig

Hey guys,

My AP1 (2002) currently has a fujitsubo exhaust. I picked up a Toda header recently, and when I go to put it on, figure I'll take the opportunity to add a HFC. If I'm going to go through the trouble of removing the cat bolts, I might as well do it all at once, right?. Looking at Berk, but should I go 63 or 70mm? Since neither my exhaust (60.5mm) nor header (60mm exit) is large diameter, I should go with the 63mm one, right?

Car is NA, but keeping my options open for possibly adding a supercharger at some point. I have no intention of going with a larger (louder) exhaust. Test pipes are out of the question too.

boostftw

get the 70mm if you plan on going FI later.

AJR Jay

If you want to stay NA, stick with a 63 resonated, however, if you will go FI down the road, like boostftw said, go 70mm.

T1R offers both, 63S resonated and 70R nonresontated, both include defouler to eliminate CEL.

If you need a quote, PM me, we ship worldwide

Cheers.

Regards,

Jason @ AJR

camuman

resonated test pipe and HFC are two totally different animals though. HFC at least you have a chance to pass emmissions.

anywho, i have had both on my car, berk 70mm hfc and t1r resonated test pipe. if emmisions are a problem, or you dont like the stinky smell from a test pipe, then go berk 70mm HFc. they are awesome and hardly cost any hp compared to a test pipe. thing flows really well.

whiteflash

Ditto. Except I'm running a 3" Asura HFC, with no issues and plenty of power. I vote for 70mm it won't hurt anything, and if you go with something larger down the road you won't have another part to replace.

jeffbrig

So there's no disadvantage to mixing a larger diameter HFC with smaller header/exhaust piping?