No the exaust is new, and i know the normal new exaust smell from when i got it. and i dont rev it when its cold, no unusual running. i went to the drags but that was last saturday. and this started RIGHT after i ran the tenisball boost test on my car (btw, that test is a load of crap. i had to do so much work so the ball didnt leak all the air out) and i dontbelieve i had any leaks.