aFe Apollo GT exhaust systems are constructed of mandrel-bent 409 stainless steel and come complete with free-flowing muffler(s), OE-style bayonet hangers, and all necessary hardware for a hassle-free installation. Their smooth curves and large diameter tubes help reduce restriction and keep exhaust gas flowing smoothly for increased horsepower and torque. aFe Apollo GT cat-back exhaust systems are 100 percent MIG-welded for race-proven strength and durability and are finished with polished or black stainless steel exhaust tip(s) with a laser-cut aFe POWER badge for a custom look.