BTW guys, I redyno'ed at Marietta Dyno Lab to compare my baseline graph to my new one. I made 416whp and 418whp on that dyno. There was an 04 CTS-V there with a magnaflow exhaust as his only mod. His best run was 350whp and 348wtq. That sound about right? Most of the 04 stock C5Z's I have seen on CF are putting down high 350's/low 360's stock. This is the exact same motor with a catback, so it seemed low to me. Would kinda make sense since I am about 10whp shy of what most people with my setup make.