I just picked up my Proton from the shop with it's new PV 2 Muffler and Monza Tip with Resonator and it sounds excellent. I think I scared the hell out of a corolla who wanted to drive 10mph under the speedlimit in the left lane. Serves her right! Anyway, it has a sweet throaty sound. To top it off, Mr. Muffler of Lincoln Park put them both on for $30 bucks, can't beat that!