I have one on my car! For the price it's a really nice piece! Fit really nice,good quality and it includes a paper on how to port the exhaust elbow "I didn't" !
Far as performance gains I went 13.2 at 102 with just kirbans DP to a single 3in full exhaust.stock injectors,at 13lbs on a cheap hypertech chip, 9.5 NLU ac16930 converter