I have a similar set-up to 08RoushGT's and put down 461rwhp with the M90. My major mods are my own billet 2.57" blower pulley, Steeda cai, Hot-rod cams, Snow Performance meth injection. It's a great little set-up, however, I road race my car and have only gone down the 1/4 a few times. Best run...