Feature lightweight 6061-T6 brushed aluminum canister with stainless steel end cap. Advanced design ensures lightning-quick throttle response. CNC-machined modular end-cap design provides tunable power. Extensively track- and dyno-tested. Silencers include spark arrestor that can be removed for closed-course racing. Steel Allen-head screws make repacking an easy task. Exclusive E-glass pillow packing. Come with stainless steel header. Can be used with OEM stock or a Pro Circuit header. U.S.F.S.-approved spark arrestor.

Developed to increase the horsepower and torque throughout the power curve. T-4 Slip-ons have a polished aluminum canister and stainless steel mid-pipe. Silencers include wire-meshed spark arrestor that can be removed for closed-course racing. Steel Allen-head screws make repacking an easy task. Can be used with OEM or Pro Circuit headers.