How's bout my DynoMacMasterborssani Exhaust with the platinum plus 6-inch tips. Really easy to install with 4 strong men to raise it into place and air impacts to bolt it up. There is a weight factor so just to maintain stock performance a chip and 10 lb pulley are required BUT the sound is really big. Like a squadron of B-17s flying over. Operation Rolling Thunder can't compare to the rumble this big, bad boy makes.