so i finally got around to getting new exhuast on my car. i didnt have a bunch of money so i got a pacesetter header, magnaflow cat, and dynomax cat back. it sounds good and all, but it does not seem to me that my aux. port acuators are working. i did have to remove them to remove the old exhuast manifold. could it be that the exhuast is too free flowing? my car is an s4 N/A by the way

 

hey man on an s4 when you go to an aftermarket highflow exhaust you lose the 2lbs backpressure required to open the aux ports. you will have to rig something like a vacumm solenoid/switch or wire them open. :-) welcome aboard