Gibson 6566 Cat-Back Dual Extreme Exhaust System Aluminized

The Gibson 6566 Cat-Back Dual Extreme Exhaust System delivers a performance upgrade for truck owners who demand aggressive sound, bold looks, and real power gains. This dual exit cat-back system features a split rear design that exits behind each rear tire at an aggressive angle, pairing a deep, mean exhaust tone with dyno-tuned performance improvements averaging 15–20 horsepower and up to 15–20 lb-ft of torque.

The system is constructed from heavy-gauge aluminized mandrel-bent tubing for consistent, unrestricted exhaust flow through every bend. At the heart of the system is Gibson's fully welded SuperFlow baffled and chambered muffler — no internal packing, no screen — delivering minimal interior drone while producing an aggressive performance sound. Factory-style hangers and all necessary hardware are included for a straightforward bolt-on installation with no welding required.

Key Features:

• Dual exit design — exits behind each rear tire at an aggressive angle
• 2.25-in. aluminized mandrel-bent tubing for maximized exhaust flow
• Baffled and chambered SuperFlow muffler — no internal packing, minimal interior drone
• Muffler dimensions: 4 x 9 x 18 in. oval body; 3.00 in. center inlet; 2.25 in. dual outlet
• 4 in. polished T304 stainless steel rolled slash-cut clamp-on tip
• Tip specifications: 2.25 in. inlet / 4 in. outlet / 12 in. length
• Includes all hardware and factory-style hangers for bolt-on installation
• No welding required
• Backed by a Gibson Lifetime Limited Warranty

The Gibson 6566 is sold as a complete kit and is designed to deliver professional-grade results with an easy bolt-on fit. It is an ideal choice for performance-minded truck owners looking to maximize exhaust flow, enhance throttle response, and give their vehicle a commanding presence on the street.