Gibson 66506 Cat-Back Dual Split Stainless Steel Exhaust System

The Gibson 66506 Cat-Back Dual Split Exhaust System delivers an aggressive, throaty exhaust note combined with real, dyno-proven performance gains. Built from heavy-duty 409 stainless steel mandrel-bent tubing, this split rear cat-back system reduces exhaust backpressure to unlock increased low-end torque and horsepower in the 1,800–3,000 RPM range where you need it most — whether cruising, passing, or towing.

Gibson Superflow Muffler:

• Design: Baffled and chambered for maximum volumetric efficiency with unrestricted flow
• No internal packing — consistent sound and flow throughout the life of the muffler
• Dimensions: 7 in. round body; 2.50 in. center inlet; 2.50 in. dual outlet; 24 in. length
• Minimal interior drone with an aggressive exterior sound

Exhaust Tips:

• Material: Polished T304 stainless steel — round, slash-cut style
• Tip dimensions: 2.50 in. inlet; 3.50 in. outlet; 12 in. length
• Clamp-on fitment; exits straight out the rear
• Compatible with most bumpers, roll pans, and trailer hitches

System Specifications:

• Tubing diameter: 2.50 in.
• Tubing material: 409 stainless steel, mandrel-bent for smooth, unrestricted flow
• Exhaust type: Single inlet / dual outlet (split rear exit)
• Tips included: Two 3.50 in. polished T304 stainless slash-cut tips
• Includes all hardware and factory-style zinc-plated hangers
• Hassle-free bolt-on installation — no welding required
• Sound level increases under towing conditions
• Proudly manufactured in the USA
• Backed by a Gibson Lifetime Limited Warranty

This complete cat-back exhaust kit includes everything required for installation. The stainless steel construction is covered under Gibson's Lifetime Limited Warranty against defects in materials, workmanship, and rust-through for the life of the original purchaser's ownership.