Gibson 65677 Cat-Back Dual Split Exhaust System Stainless Steel

The Gibson Performance 65677 Cat-Back Dual Split Exhaust System delivers a powerful combination of aggressive sound, increased performance, and a clean dual-tip look for truck and SUV applications. Engineered and dyno-tested to decrease backpressure, this stainless cat-back system is proven to add 10–20 horsepower and 15–20 lb-ft of torque, with peak gains concentrated in the 1,800–3,000 RPM range where you need it most.

Key Features:

• 409 Stainless Steel Mandrel-Bent Tubing — 3.5-in. intermediate / 2.25-in. tailpipe diameter for smooth, unrestricted exhaust flow
• Gibson SuperFlow Muffler — Fully welded baffled and chambered design with no internal packing; delivers a deep, aggressive exhaust note with minimal interior cabin drone. Oval body: 4 x 9 x 18 in.; 3.0-in. center inlet; 2.25-in. dual outlet
• Polished T304 Stainless Rolled Slash-Cut Tips (x2) — 4-in. outlet, 2.25-in. inlet, 12-in. length; clamp-on installation; exits straight out the back
• Dual Split Rear Exit — Compatible with most factory bumpers, roll pans, and trailer hitches
• Hassle-Free Bolt-On Installation — Includes all factory-style zinc-plated hangers and clamps; no welding required
• Made in the USA — Backed by a Gibson Lifetime Limited Warranty
• Street-legal in all 50 states; will not void factory warranty
• Note: Exhaust sound may be more pronounced under towing conditions

The Gibson 65677 is a direct bolt-on performance upgrade that replaces your existing cat-back section from the catalytic converter back. Every pipe is mandrel-bent for consistent flow through every curve, and the SuperFlow muffler's straight-through baffled and chambered construction eliminates backpressure without sacrificing sound quality. Whether you're looking for a performance edge on the road or a standout dual exhaust appearance, the Gibson 65677 delivers on all fronts.