Gibson 615501 Cat-Back Single Exhaust System Stainless Steel Swept Side

The Gibson 615501 Cat-Back Single Exhaust System is Gibson Performance's top-performing single exhaust system, engineered for maximum low-end power delivery. Dyno-tested results demonstrate average gains of 10–15 horsepower and 15–20 lb-ft of torque, with peak output concentrated in the 1,800–3,000 RPM range — exactly where acceleration, hill climbing, towing, and passing power matter most.

At the heart of this system is Gibson's Superflow muffler, featuring a fully welded baffled and chambered design with no internal packing. This construction delivers a deep, aggressive exterior exhaust tone while keeping interior cabin noise lower than competing performance exhaust systems. The system exits behind the rear tire for a clean, factory-integrated appearance.

All tubing is 3-inch diameter, 409 stainless steel, mandrel-bent to maintain a constant cross-section through every curve — eliminating flow restrictions and minimizing backpressure for consistent performance gains.

Muffler Specifications:

• Style: Baffled & Chambered — No Internal Packing
• Body: 8 in. Round
• Inlet: 2.50 in. Dual Inlet
• Outlet: 3 in. Offset
• Length: 24 in.
• Sound: Minimal Interior Drone, Aggressive Exterior Tone

Tip Specifications:

• Style: 3.50 in. Round Slash-Cut, Clamp-On
• Material: Polished T304 Stainless Steel
• Inlet: 3 in. | Outlet: 3.50 in. | Length: 12 in.

System Features:

• 3-inch 409 stainless steel mandrel-bent tubing
• Includes all factory-style hangers and hardware for bolt-on installation
• No welding or drilling required
• Made in the USA
• Street-legal in all 50 states — will not void factory warranty
• Backed by a Lifetime Limited Warranty

This complete cat-back kit includes everything needed for a professional-quality installation right out of the box, with no modifications required.