aFe MACHForce XP Exhausts Cat-Back SS-409 EXH CB GM Trucks 1500 07-08 V8 157 WBaFe MACHForce XP Exhausts Cat Back SS 409 EXH CB GM Trucks 1500 07 08 V8 157 WB The new MACH Force XP exhaust is engineered to perform in the most extreme environments. This system is constructed from mandrel bent 4 in. 409 stainless steel tubing for maximum flow; increased horsepower; increased torque; and lower EGTs. MACH Force XP exhaust systems are the perfect combination of performance; fit; and value. All systems use factory mounting locations
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