Gibson 65676 Cat-Back Dual Extreme Exhaust System Stainless Steel

The Gibson 65676 Cat-Back Dual Extreme Exhaust System is a bolt-on dual-exit performance exhaust built for drivers who demand aggressive sound, bold street presence, and measurable power gains. The system exits behind each rear tire at a signature aggressive angle, delivering a deep, powerful exhaust tone that commands attention.

Performance Gains:

Dyno-tuned and tested for the specific application, this exhaust system is engineered to maximize low-end torque and horsepower in the 1,800–3,000 RPM range, delivering average gains of 10–15 horsepower and 15–20 lb-ft of torque.

Key Features:

• Tubing: 3.5-in./2.25-in. mandrel-bent 409 stainless steel tubing for maximum flow and long-term durability
• Muffler Design: Baffled and chambered superflow muffler — no internal packing, aggressive exhaust note, minimal interior drone
• Muffler Dimensions: 4 x 9 x 18 in. oval body; 3.0 in. center inlet; 2.25 in. dual outlet
• Tip Style: 4 in. polished T304 stainless steel rolled slash-cut tip, clamp-on
• Tip Specifications: 2.25 in. inlet; 4.0 in. outlet; 12 in. length
• Installation: 100% bolt-on with factory hangers and clamps — no welding required
• Origin: Proudly made in the USA
• Warranty: Backed by a Gibson Lifetime Limited Warranty

Constructed from high-quality stainless steel with mandrel-bent tubing throughout, the Gibson Dual Extreme resists corrosion and maintains structural integrity under demanding conditions. The baffled and chambered muffler design keeps interior drone to a minimum while still producing the aggressive performance sound the Dual Extreme series is known for. Simple bolt-on fitment means professional installation is not required — no cutting, no welding, just direct replacement of your factory exhaust system.