Didn't start her up yet she's been sitting for months because of an idle problem.the catback i baught from ebay sounded nice and quiet.its a 2.5 cat back.im waiting on the es shifter bracket bushing so i can put everything back together.that and putting bak the upper plentumof the intake manifold since i cleaned out the tb egr anew replaced injection o rings.since i had the time i heat wrapped the headers and half the dp along with high silicone paint since there's no more heat shield.i used oem studs. One came out went i unbolted it. The other one wasn't even there Just half of it buried in the head.that's the one i used this method with