the exhaust kept rattling, vibrating loose from top to bottom, kept redoing at manifold head, metal ripping (had to have welded twice at muffler joint), an actual big chunk of the frickin exhaust pipe broke away on the freeway and also muffler cracked at the forward mount. Ridiculous! so today I ordered a new Vance & Hines carburetor jet kit and exhaust system. hopefully it don't vibrate away the $331 down the freeway... I guess its a common theme with the Blast???