Gibson 615606 Cat-Back Single Exhaust System, T-304 Stainless Steel

The Gibson 615606 Cat-Back Single Exhaust System is engineered and dyno-tested to deliver real-world performance gains where you need them most. Designed for improved acceleration, maximum hill climbing, towing, and passing power, this single side exit system exits behind the rear tire for a clean, factory-correct appearance. Dyno testing confirms peak torque and horsepower gains in the critical 1,800–3,000 RPM range, with average increases of 10–15 HP and 15–20 lb-ft of torque.

Built from T-304 stainless steel with mandrel-bent tubing, the system includes Gibson's baffled and chambered Superflow muffler — fully welded with no internal packing to blow out. This design minimizes interior drone while delivering an aggressive exterior exhaust note. The slip-fit connections reduce turbulence and power-robbing backpressure throughout the system.

Muffler Specifications:

• Design: Baffled and chambered, no internal packing
• Shape: 8 in. round body
• Inlet: 3.00 in. offset
• Outlet: 3.00 in. offset
• Body length: 24 in.
• Sound: Aggressive tone with minimal interior drone

Exhaust Tip Specifications:

• Style: Round slash-cut, clamp-on
• Material: Polished T-304 stainless steel
• Inlet: 3 in.
• Outlet: 4 in.
• Length: 12 in.

Key Features:

• T-304 stainless steel mandrel-bent tubing for unrestricted exhaust flow
• Superflow muffler — fully welded, nothing to pack or blow out
• Single side exit behind the rear tire
• Includes all hardware and factory-style zinc-plated hangers
• Hassle-free bolt-on installation — no welding or cutting required
• Made in the USA
• Backed by a Lifetime Limited Warranty

Complete with all necessary mounting hardware and factory-style hangers, this system installs without welding for professional results at home. Covered by Gibson's Lifetime Limited Warranty against defects in materials and workmanship, including rust-through on stainless steel components.