Gibson 66560 Cat-Back Dual Sport Exhaust System Stainless Steel

The Gibson 66560 Dual Sport Cat-Back Exhaust System is a bolt-on stainless steel performance exhaust designed for trucks and SUVs. Featuring dual exits routed behind the rear tires, this system delivers a commanding look without interfering with towing or trailer clearance. No welding is required — all necessary hardware and factory-style hangers are included for a clean, professional installation.

Gibson's mandrel-bent T304 stainless steel tubing maintains a consistent diameter through every bend, minimizing flow restriction and backpressure for maximum exhaust scavenging. Dyno-tested and dyno-tuned to the specific application, this system delivers average gains of 10–15 horsepower and 15–20 lb-ft of torque — primarily in the 2,000–4,000 RPM range where trucks and SUVs do most of their work.

Key Features:

• Dual-exit cat-back design routes exhaust tips behind the rear tires, keeping trailer connections unobstructed
• Baffled and chambered muffler design produces an aggressive, deep exhaust tone with minimal interior drone
• No internal packing — long-lasting sound and performance with no degradation over time
• Mandrel-bent stainless tubing for unrestricted, consistent exhaust flow
• Dyno-proven average gains of 10–15 HP and 15–20 lb-ft of torque
• Bolt-on installation with all hardware and factory-style hangers included — no welding or cutting required
• Backed by Gibson's Lifetime Limited Warranty

Muffler Specifications:

• Style: Baffled & Chambered, No Internal Packing, Minimal Interior Drone, Aggressive Sound
• Shape: 7 in. Round
• Inlet: 3 in. Center
• Outlet: 2.50 in. Dual
• Length: 24 in.

Exhaust Tip Specifications:

• Style: 3.50 in. Polished T304 Stainless, Round Slash-Cut, Clamp-On
• Inlet: 2.50 in.
• Outlet: 3.50 in.
• Length: 12 in.