Gibson 65570 Cat-Back Dual Extreme Exhaust System Stainless Steel 2.25in

The Gibson 65570 Cat-Back Dual Extreme Exhaust System delivers aggressive performance and bold dual-exit styling in corrosion-resistant 409 stainless steel. Constructed with 2.25-inch mandrel-bent tubing, this bolt-on cat-back system routes dual exhaust pipes to exit behind each rear tire at an aggressive angle, providing a powerful street presence alongside real, dyno-tested performance gains.

At the heart of this system is Gibson's baffled and chambered Superflow muffler — engineered without internal packing to maintain consistent flow and sound throughout the life of the system. The result is a deep, aggressive exhaust tone with minimal interior drone, and an exhaust flow restriction of just 5% compared to 34% or more in a typical stock muffler.

Key Features:

• Tubing: 2.25 in. 409 stainless steel mandrel-bent tubing for smooth, unrestricted flow
• Muffler: Baffled and chambered Superflow design — no internal packing, aggressive sound, minimal interior drone
• Muffler Dimensions: 8 in. round body; 3 in. offset inlet; 2.25 in. dual outlet; 24 in. length
• Tips: Dual 3.5 in. polished T304 stainless steel round slash-cut tips, clamp-on style
• Tip Specifications: 2.25 in. inlet; 3.50 in. outlet; 12 in. length
• Performance: Dyno-tuned and tested for average gains of 15–20 horsepower
• Installation: Easy bolt-on fitment — no welding required
• Warranty: Backed by Gibson's Lifetime Limited Warranty

Gibson designs each exhaust system at their fully equipped R&D center using engine and chassis dynos, flow benches, and audio testing equipment to maximize power delivery in the 1,800–3,000 RPM range — where it matters most for everyday driving, towing, and performance. The slip-fit component joining method further reduces turbulence and power-robbing backpressure common with ball-and-socket or flange-and-gasket connections.