Revitalize your ride's sound and performance with aFe Mach Force XP mufflersdesigned to deliver a deep, throaty growl at acceleration, but maintain a smooth sound at idle. These performance mufflers boast a 409 stainless steel construction with a corrosion-resistant brushed finish, and are embossed with an aggressive 5 in. aFe Power logo. And, thanks to aFe's improved design, a straight-through perforated core with heat-resistant packing reduces backpressure, maximizes exhaust flow, and improves throttle response over your factory exhaust. aFe Mach Force XP mufflers are offered in several sizes and configurations, in your choice of a round or oval body. (Installation hardware and clamps are sold separately.)