What kind or reasonable gains

[xonn]

could I expect to see from an OBX header, 3 inch exhaust and cold air intake on an otherwise stock ka? 10whp over stock?

[Arrow]

just my 2 cents but I wouldn't believe that you would need a 3" exhaust. I think that that is overkill inless you are planning to have over 300 whp sometime soon... You would lose a lot of low end torque... Not worth it in my opinion, I would stick w/ 2.25 or 2.5 myself. But that again is just my 2 cents. I think though other than that you could probably see 10 whp... I wouldn't think that would be too high of an estimate.

[S13ChucKAT]

10whp.. maybe at TOP end. low end say goodbye torque.

although ive seen on the VQ maxima a gain of like 15whp alone with a gutted cat.

[UncleBen]

VG's and VQ's are also insane motors, unlike the KA.

[dabum]

havent ppl seen that dyno on freshalloy with the 240 with the full 3" on stock motor makin 14hp and amazing no loss in low end torque, numbers stayed the same.. obviously less backpressure will decrease torque but apparently not in whoevers 240 that was...

[dabum]

uhmm i went for a quick search before bed.. i think this is it but im 2 tired and sleepy to read it

http://forums.freshalloy.com/u...&vc=1

anyways i think the mods you want to add will give you 10-15 whp..gudluk.