Well I finally made a trip out to the dyno this weekend to see what the car was putting down. This was on the stock motor through an M6 with 3.42 gears and the only mod being the GMMG exhaust. The car is a 2002 with just over 17k miles and made 321.2 rwhp and 336.9 rwtq. I'll post the graph as soon as I get my scanner hooked back up.

 

nice. I just took my car today and put down 310hp and 330tq with a lid and muffler. I have some tuning to do with the air fuel ratio in the top end and might pick up a few but all in all im happy, oh by the way it was through an auto which dyno's a bit lower than a m6

 

good numers

 

not bad not bad