Gibson 66600 Cat-Back Dual Sport Exhaust System Stainless Steel

The Gibson Performance 66600 Dual Sport Cat-Back Exhaust System is engineered for truck and SUV owners who want a bold exhaust presence without sacrificing towing practicality. The dual-exit design routes exhaust tips behind the rear tire, keeping your trailer hitch and wiring clear while delivering a distinctly aggressive street look—whether you're on pavement or the trail.

Constructed from 2.5-inch 409 stainless steel mandrel-bent tubing, the system maximizes exhaust flow with minimal restriction. Mandrel bending preserves consistent tube diameter through every curve, reducing turbulence and backpressure throughout the entire system. Dyno-tested to deliver average gains of 10–15 horsepower and 15–20 lb-ft of torque, the 66600 targets the usable power band where trucks and SUVs need it most.

Key Features:

• Muffler: Baffled and chambered design — no internal packing, minimal interior drone, aggressive exterior tone
• Muffler Dimensions: 7 in. round body; 3 in. center inlet; 2.50 in. dual outlet; 24 in. overall length
• Tubing: 2.50 in. diameter, 409 stainless steel mandrel-bent construction
• Exhaust Tips: 3.5 in. polished T304 stainless steel, round slash-cut style, clamp-on fitment
• Tip Dimensions: 2.50 in. inlet; 3.50 in. outlet; 12 in. overall length
• Exit Location: Behind the rear tire — tow-friendly, trailer-clearance design
• Approximately 5–8 decibels louder than stock with a deep, throaty tone outside and minimal added noise inside the cab
• Bolt-on installation — no welding required; includes all hardware and factory-style hangers
• Made in the USA
• Covered by Gibson's Lifetime Limited Warranty

Street legal in all 50 states, the Gibson 66600 does not affect your factory powertrain warranty. Installation is straightforward with all mounting hardware and OEM-style hangers included in the kit.