Quote Originally Posted by speedminded
ah, $3,800 PLUS installation for the entire HFP package on the '07 Sedan: wheels, springs, muffler, and aerodynamic kit (front, sides, & rear)...not sure what the Mugen runs.

whats the difference in the muffler than the one that comes stock on the si? mines loud enough and as far as the hfp body kit i would prolly only get the front lip