MACH Force-Xp 304 Stainless Steel Cat-Back Exhaust System aFe MACH Force-Xp 304 SS Catback Exhaust 17-19 Dodge Challenger V8-5.7L Cat-Back Exhaust Add more power and sound to your Challenger with this MACH Force-Xp cat-back system which produced gains of up to +13 horsepower and +15 lbs. x ft. torque as measured on our in-house dyno. Dual 3" mandrel-bent, MIG welded, 304 stainless steel tubing with X-pipe and crossover balance tube keeps exhaust flowing smoothly and evenly for power gains you can feel and hear. This system utilizes the factory exhaust valve motor and spherical clamps are used to retain the factory tips for a stock appearance. Dual stainless steel, high flow mufflers finished in high temp powder coating deliver an aggressive, performance exhaust note. MACH Force-Xp 304 Stainless Steel Cat-Back Exhaust System Dodge Challenger 17-23 V8-5.7L Incorporated X-Pipe/Crossover Balance Tube To Equalize Pulses 304 Stainless Tubing Outflows and Outlasts Factory Exhaust Incl. Valves To Incorporate Factory Exhaust Valve Motor Mufflers Finished In High Temp Powdercoating Mufflers Deliver An Aggressive Exhaust Note Spherical Clamps To Retain The Factory Tips MACH Force-Xp Cat-Back Exhaust System Reduces Drone and Improves Sound Long Lasting Good Looks