After my xpipe install should i get my car retuned? My friend who helped me put it on when we were letting it idle put his hand down to feel the air comin out of the tailpipe and it was really hot. And it is kinda hot to the touch as it comes out, but i dont know how it felt before. Think this could have made the car run more lean? And as i was driving it i dont know if it was detonation but i think i heard a pop but it could have very well been the Xpipe rasp sound. Input?