Alpha Dog Under Belly Exhaust - 848, 1098, 1198 & StreetFighter (http://www.youtube.com/watch?v=H8zRuB0zzQ0&feature=youtube_gdata_player#)
Can't really hear the exhaust with all that music. And almost 2k for a stainless and 3k for titanium?! It doesn't even come with the tune...