The header and mid-pipe are made from 304 stainless steel and CNC bent for a precise fit. Stainless steel header flanges ensure a solid mount to the exhaust port. The muffler is constructed with a 0.100-inch-thick aluminum wall that comes in a satin finish or can be custom ordered with a polished finish. An O-ring seal between the mid-pipe and muffler assures a leak-resistant seal. The muffler is completely rebuildable and repackable with front and rear billet-aluminum end caps.