I got my friend to video tpe me in my car kicking i and stuff. HWne I started watching it on one part of the tape i was runnin glike 60 and he got right behind me when I hit it, and when I hit it the smoke didnt really puff it was when the car shifted I tihnk of either left out of it. What would be the cause of this little puff of like grey smoke? 99 Trans am,A4, 3.23's, hooker ctaback,lid, and K&n.

 

Unburned fuel due to the rich factory tune, not a problem just about every car i've seen with exhaust does it.

 

Perfectly normal. Put it on the dyno and youll see how much an LS1 really smokes. Usually its thin enough while driving to dissipate in the air and not noticable.

 

Ok so this doesnt mean I am running too rich or lean? Just normal. I went back and watched the video again and it didnt it when I hit the next gear.