Gibson 615630 Cat-Back Single Exhaust System Stainless Steel 3.5 In. Tubing

The Gibson 615630 Cat-Back Single Exhaust System is a stainless steel, high-performance exhaust upgrade engineered and dyno-tested to maximize low-end power output. Featuring 3.5-inch mandrel-bent tubing and a swept-side exit behind the rear tire, this system delivers a deep, aggressive exhaust tone while keeping interior cab noise lower than competing performance exhaust systems.

At the heart of the system is Gibson's SuperFlow muffler — a baffled and chambered, straight-through design with no internal packing that reduces restriction and increases exhaust flow without creating excessive drone. Dyno testing confirms maximum torque and horsepower gains in the critical low-end power band (1,800–3,000 RPM), with average gains of 18–21 horsepower and 20–22 lb-ft of torque — ideal for towing, hill climbing, hauling, and passing performance.

Key Features:

• Cat-back system with 3.5-inch stainless steel mandrel-bent tubing for unrestricted exhaust flow
• SuperFlow muffler — baffled and chambered design, no internal packing, minimizes interior sound levels
• Swept-side exit behind the rear tire for a clean, factory-integrated appearance
• Includes a T304 polished stainless steel tip with clamp-less slip-on connection design
• Zinc-plated hangers and clamps included for a complete, hassle-free installation
• No drilling or welding required — bolt-on fitment using factory mounting locations
• 50-state emissions legal; will not void factory powertrain warranty
• Backed by Gibson's Lifetime Limited Warranty for the original vehicle purchaser

Built from heavy-duty T304 stainless steel throughout, the Gibson 615630 is a complete cat-back kit that includes everything needed for a professional-quality installation. Whether you're looking to improve daily driving response or maximize towing and hauling performance, this system delivers real, measurable results right where you need them most.