New Intake/Exhausts

Denny McLain

I have to ask the poignant question...... why have you not dynoed any of the products you push? If I as your typical average Joe pay for access to dyno time, why does not a shop whom makes money off of performance products?

Maybe part of the answer lies here: COBB Tuning Blog G37 Intake Testing

No way in hell you're going to pick up 18 hp from only a cat back exhaust w/o removing the stock cats. Maybe replacing both.

I picked up 13 hp from high flow cats, Y-Pipe and high flow filters. The cats are double cats and appear to be very restrictive. The car totally changed how it sounded and also ran leaner after replacement with high flow cats. Next dyno session will be removing the exhaust after the Y-pipe to see how effective/ineffective the stock system is.

http://s412.photobucket.com/albums/p...s-y-pipe-1.jpg

Have an open challenge to Stillen to provide me an intake that I will dyno in the method of their choice paying out of my back picket to verify their claim of a 18 hp gain. So far no intake.

As a rule fo thumb, if I can get half of what the claimed hp gains are from simple boltons.... I'm a happy camper.