aFe MACHForce XP 3in 304 SS Axle-Back Dual Exhaust (NPP) w/ Polished Tips 16-17 Camro SS V8-6.2LTesting: In testing, the axle back exhaust system produced a max gain of +4 horsepower and +4 ft. lbs. of torque verified by our in house dyno. Potential for up to +24 horsepower and +27 lbs. x ft. of torque when combined with aFe's Twisted Steel street Tri Y headers X Pipe (P N: 48 34127 YC). Aggressive Sound: Dual free flowing mufflers are used to absorb high pitch tones producing a powerful sound and unleashing all available horsepower and torque.