Gibson 9517 Cat-Back Super Truck Exhaust System Aluminized

The Gibson 9517 Cat-Back Super Truck Exhaust System is a bolt-on performance upgrade engineered to deliver an aggressive race-rumble tone along with real, dyno-proven power gains. Built with aluminized mandrel-bent tubing, this system reduces backpressure throughout the exhaust path for improved throttle response and overall engine efficiency.

At the core of the system is the Gibson Superflow™ Muffler, featuring a baffled and chambered internal design with no loose internal packing. This construction produces a loud, aggressive exhaust note outside the cabin while keeping interior drone to a minimum — a key advantage over straight-through designs.

Dyno testing demonstrates consistent gains of 10–15 horsepower and 15–20 lb-ft of torque, with peak performance focused in the low-end power band (1,800–3,000 RPM) where trucks need it most — towing grades, acceleration, and passing.

Key Features:

• Aluminized mandrel-bent tubing — smooth bends maintain full pipe diameter for unrestricted flow
• Gibson Superflow™ Muffler — baffled and chambered design, no internal packing, minimal interior drone
• Muffler dimensions: 7 in. round body; 3.00 in. center inlet; 2.50 in. dual outlets; 19 in. overall length
• Dual tailpipes exit in front of the rear tires — classic Super Truck race-truck styling
• 6 in. polished T304 stainless steel oblong slash-cut tip — clamp-on; outlet: 6 x 2.75 in.; tip length: 6 in.
• No welding required — complete bolt-on installation with all hardware and factory-style hangers included
• Sound level may exceed 95 decibels
• Not recommended for towing applications
• Proudly Made in the USA
• Backed by Gibson's Lifetime Limited Warranty

The Gibson 9517 is an ideal choice for truck owners who want a street-legal, high-performance cat-back exhaust with a commanding sound and genuine horsepower gains — all without requiring professional installation.