hey guy lately ive been smelling exaust fumes in the car and sometimes it smells as if its coming from the vents..if this is an exaust leak it would be at the precat if i could smell it through the vents right? if i got a downpipe in addition to a intake and catback would i need to upgrade my fuel managment?thanks..

 

if there is a leak at the manifold or on the DP, you would notice a puff puff of exhaust under the hood near the turbos. especially on a cold start. you might also find the car hard to start if it gets too bad.....you will not need to upgrade the FM for these mods. go too much further like intercooler and midpipe, and etc, and you will definately need one.

i smell exhaust with one window open or just the sunroof open, however i run rich, no air pump, and have a straight through exhaust.....

-louis