aFe 3in SS Axle Back Chevy Camaro SS ZL1 (16 17) (49 34068 B). Get increased exhaust flow, more horsepower and torque, improved performance and lower exhaust gas temperatures with the aFe Mach Force XP Cat Back Exhaust System. aFe dyno tests every system for maximum gains, and constructs them from mandrel bent stainless steel for maximum flow and long lasting durability. This system begins at the Cat (Catalytic Converter). Features: Increases horsepower and torque Improves performance Lowers exhaust gas temperature Flow bench and dyno tested Welded hangers with swaged ends Slotted and swedged ends Premium quality band clamps Backed by a 2 year limited warranty Proudly made in the USA A performance exhaust system is one of the most common ways of improving a vehicle's operation. The theory is simple; just reduce restriction to increase exhaust flow and you gain power. But all exhaust systems are not created equal; in reality there's more to it than just selling some sewer pipe sized tubes. aFe tests its systems on the flow bench and the dynamometer to determine the right pipe size and muffler construction. Then they mandrel bend the pipes to ensure they maintain their shape and size throughout the entire length, to provide smooth, unrestricted airflow. Tubes that are not mandrel bent can lose up to 20% of their diameter in sharp bends. Some systems also include a straight muffler delete pipe if a more aggressive sound and maximum flow is desired. A typical aFe system will increase exhaust flow by up to 29% and lower EGT (Exhaust Gas Temperature) by up to 100??, with a corresponding improvement in power and performance. But performance is only part of the equation. A quality exhaust system should be easy to install and made to last. The muffler and all pipes of the Mach Force XP system are constructed from durable 409 stainless steel. To ensure a tight seal, slotted and swedged ends are used whenever possible. When used with the supplied premium quality band clamps, the tightest, leak free seal is the result. Every hanger is thoroughly welded DETAILS: Dyno Proven Gains up to +4 HP & +4 Lbs. x Ft. TQ Constructed from 3" Mandrel Bent, MIG Welded 304 Stainless Steel Tubing Includes Factory Style NPP Dual Mode Exhaust Valves Utilizes Dual High Flow Stainless Steel Mufflers Includes Quad 4" Diameter Gloss Black Tips Uses All Factory Hanger Locations for a Hassle Free Installation