How's it going guys, two weeks ago I purchased after market test pipes to see how my car would sound with them, Im very pleased. deff feel a big difference as far as performance goes. my only concern is that there is a bit of smoke as i rev sometimes, at idle it is perfectly fine but at high RPMS it will proceed to smoke. I have a link here maybe you guys can determine what could be the cause of this. I would most likely say the test pipes as I've never experienced this with stock cats. Any info or input on this i would def appreciate. Thanks Guys.

https://www.youtube.com/watch?v=YIzK...ature=youtu.be


2004 G35 Coupe 6MT 80k