Gibson 65579 Cat-Back Dual Extreme Exhaust System Stainless Steel

The Gibson 65579 Dual Extreme Cat-Back Exhaust System delivers aggressive dual-exit performance in fully corrosion-resistant 409L stainless steel. Dyno-tuned and tested for real-world driving conditions, this bolt-on system is engineered to deliver average horsepower gains of 15–20 hp, with maximum power output in the 1,800–3,000 RPM range where it matters most for daily driving and towing.

Two separate exhaust pipes exit behind each rear tire at an aggressive angle, giving your truck a bold, purposeful stance alongside the performance to match. The baffled and chambered SuperFlow muffler design eliminates internal packing for minimal interior drone while producing a deep, aggressive exhaust tone. CNC mandrel-bent tubing ensures consistent diameter throughout every bend, reducing restriction and backpressure for optimal exhaust flow.

Muffler Specifications:

• Design: Baffled and chambered SuperFlow muffler
• No internal packing — minimal interior drone
• Body: 8 in. round
• Inlet: 3.50 in. center inlet
• Outlet: 3.00 in. dual outlet
• Length: 24 in.

Exhaust Tip Specifications:

• Material: Polished T304 stainless steel
• Style: Round slash-cut, clamp-on
• Inlet: 3 in.
• Outlet: 4 in.
• Length: 12 in.

System Features:

• Tubing: 3 in. 409L stainless steel, CNC mandrel-bent
• Dual exit — one pipe behind each rear tire
• Slip-fit connections reduce turbulence and backpressure
• Includes all hardware and factory-style zinc-plated hangers
• No welding required — complete bolt-on installation
• Manufactured in the USA
• Backed by a Lifetime Limited Warranty against defects in materials, workmanship, and rust-through

The Gibson 65579 ships with everything needed for installation including clamps, hangers, and detailed instructions. The stainless steel construction is warranted for the life of the original purchaser's vehicle ownership, covering both workmanship defects and rust-through.