Gibson 618805 Cat-Back Single Exhaust System Stainless Steel

The Gibson 618805 Cat-Back Single Exhaust System is a bolt-on stainless steel performance exhaust designed to maximize low-end power, towing capability, and overall driving performance. Constructed from 409-L stainless steel mandrel-bent tubing, this system delivers unrestricted exhaust flow with minimal backpressure, and exits cleanly behind the rear tire for a factory-clean appearance.

At the heart of the system is Gibson's signature baffled and chambered SuperFlow muffler, engineered to reduce interior drone while producing an aggressive, deep exterior tone. Dyno testing confirms average horsepower gains of 10–15 HP and torque increases of 15–20 lb-ft, with peak output delivered in the critical low-RPM range of 1,800–3,000 RPM — ideal for acceleration, hill climbing, passing, and towing.

Key Features:

• Tubing: 2.50 in. stainless steel mandrel-bent tubing for smooth, unrestricted exhaust flow
• Muffler Design: Baffled & chambered SuperFlow design — no internal packing, minimal interior drone, aggressive exterior sound
• Muffler Dimensions: 6 in. round body; 2.50 in. offset inlet; 2.50 in. offset outlet; 24 in. length
• Exhaust Tip: 3.5 in. polished T304 stainless steel, round slash-cut, clamp-on style
• Tip Dimensions: 2.50 in. inlet; 3.50 in. outlet; 12 in. length
• Exit Position: Behind the rear tire
• Installation: Hassle-free bolt-on fit using factory-style hangers — no welding, no drilling required
• Includes: All necessary hardware and factory-style hangers
• Backed by Gibson's Limited Lifetime Warranty

The Gibson 618805 delivers a professional-quality upgrade with a clean, polished finish. The stainless steel construction resists corrosion for long-term durability, making it a smart performance investment.