dparm

Okay, 5-7hp...but with what mods? Header with a properly sized cat and exhaust will make a lot more power than the header alone.

SILAP1

yea thats just what they told me , but we will get some hard facts when i dyno mine

iluvmys2000

do all these header fit both ap1 and ap2 motor?

SILAP1

yea i do believe they are mostly the same . when you purchase it might say 00-05 or 06-08

SILAP1

I installed my T1R response header today . First impression is very nice piece perfect fitment looks great. Totally changed the sound of the car and the Vtec engagement is alot diferent . The butt dyno definately says some good mid range gains and top end gains also. We will see for sure this week when i hit the dyno . shooting for 220 whp my mods are 70mm TP 70mm Greddy Tic FIPK intake VAFC and the header now. I will retune and post results last dyno was 208 whp uncorrected on dynojet with just TP exhaust and vafc .

iDomN8U

Check A/F ratio too.

SILAP1

yea im going to retune the car this week with wide band o2 at dyno .

Q8s2k

Where did you buy the Header from ??

red@9k

evasive and AJ-racing has them

SILAP1

So i hit the dyno today . I am very pleased with mid range gains and top end also. a good solid 10whp gain from 5700-7500 with a slight gain at top of a few and holds power to 9k . The dyno was same dyno but a diferent day so were not back to back without and with header. As soon as i drove the car after the retune i felt a huge increase in acceleration . Its a more wide powerband and pulls right to 9k. so the but dyno was correct big increase in mid range between 5700 7500 rpm . car feels great really feels alot stronger . Peak power 210whp peak torque 144lbs dynojet , uncorrected