Quote Originally Posted by LongArmoftheLaw View Post
Eddiememphis, have you also installed new headers in addition to the K&N?
Not on the FJ.

On other vehicles, sure. It depends on how restrictive the stock manifolds are but it often can make an amazing increase in power. Of course then you need a larger downstream exhaust system...

This was much easier on non-emissions vehicles. Intake, exhaust and a cam can turn Mom's '68 Malibu into a rip snortin' Chevelle!