This Gibson 616517 single side cat-back exhaust system delivers dyno-proven power gains for 2020-2024 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD Crew Cab models with 6.6 ft bed. This stainless steel system exits behind the rear tire boosting acceleration towing hill climbing and passing power with maximum torque and horsepower from 1800-3000 RPM. Gains average 10-15 horsepower and 15-20 lb-ft torque while staying quieter inside the cab than other performance exhausts.
Key Features
- Performance Gains: Dyno tested for 10-15 HP and 15-20 lb-ft torque increases focused at low-end RPM for real-world towing and hauling power.
- Single Side Exit: Positions behind rear tire for clean aggressive styling and balanced flow without drone in the cab.
- Bolt-On Installation: Direct hassle-free fit using factory mounting points no welding or cutting required includes all hardware.
- Stainless Steel Build: T-304 mandrel-bent tubing and muffler for corrosion resistance and lasting durability.
- Bolt-on design uses OEM hangers and clamps for 1-2 hour install.
- Full T-304 stainless steel tubing muffler and tips for rust resistance and mirror-polished finish.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2020-2026 | Chevrolet | Silverado 2500 HD | 6.6L Crew Cab, Long Bed |
| 2020-2026 | Chevrolet | Silverado 2500 HD | 6.6L Double Cab, Long Bed |
| 2020-2026 | Chevrolet | Silverado 2500 HD | 6.6L Regular Cab, Long Bed |
| 2020-2026 | Chevrolet | Silverado 3500 HD | 6.6L Crew Cab, Long Bed |
| 2020-2026 | Chevrolet | Silverado 3500 HD | 6.6L Double Cab, Long Bed |
| 2020-2026 | Chevrolet | Silverado 3500 HD | 6.6L Regular Cab, Long Bed |
| 2020-2026 | GMC | Sierra 2500 HD | 6.6L Crew Cab, Long Bed |
| 2020-2026 | GMC | Sierra 2500 HD | 6.6L Double Cab, Long Bed |
| 2020-2026 | GMC | Sierra 2500 HD | 6.6L Regular Cab, Long Bed |
| 2020-2026 | GMC | Sierra 3500 HD | 6.6L Crew Cab, Long Bed |
| 2020-2026 | GMC | Sierra 3500 HD | 6.6L Double Cab, Long Bed |
| 2020-2026 | GMC | Sierra 3500 HD | 6.6L Regular Cab, Long Bed |
Specifications
| Manufacturer | Gibson |
|---|---|
| Manufacturer Part Number | 616517 |
| Product Type | Catback |
| Fitment Type | Vehicle specific |
| Tubing Diameter | 3.50-in. 409 Stainless mandrel bent tubing. |
| Tip Description | 5in. Polished T304 Stainless Rolled, Slash- Cut Tip, Clamp on. |
| Tip Specification | Inlet 3.5 in., Outlet 5.0 in., L-12 in. |
| Muffler Description | Baffled &, Chambered Design, No internal Packing, Minimal Interior Drone, Aggressive Sound |
| Muffler Dimension | 8 in. Oval Body, 3.5 in. Offset Inlet,3.5 in. Offset Outlet, , L-24 in. |
| Additional Description | Includes all hardware and factory style hangers for easy bolt on installation. |
| Exit Position | Exits Behind Rear Tire. |
| Warranty | Lifetime Limited Warranty |
What's Included
- One new Gibson catback in the exact configuration identified by manufacturer part number 616517
- Hardware and accessories only when supplied for this exact part number
About Gibson
Gibson develops vehicle-specific and universal exhaust components for street, truck, SUV, and performance applications. Selection and installation requirements remain exact-part-number specific.
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Frequently Asked Questions
Which vehicles fit Gibson GIB616517?
Gibson GIB616517 is listed for 2020-2026 Chevrolet Silverado 2500 HD, 2020-2026 Chevrolet Silverado 3500 HD, 2020-2026 GMC Sierra 2500 HD, and 2020-2026 GMC Sierra 3500 HD. Confirm the exact engine, trim, drivetrain, body or cab configuration, exhaust layout, and every application note before ordering.
What should I verify before ordering Gibson GIB616517?
Match the exact part number, system type, material, finish, tubing and connection diameters, exhaust configuration, package contents, and current manufacturer notes shown in this listing.
What should be checked when installing Gibson GIB616517?
Verify all interfaces, hanger positions, tip and body clearances, clamp or fastener torque, leak-free operation, and local emissions requirements. Reinspect the system after its first heat cycle.
Installation Instructions
Follow the current Gibson instructions and vehicle service information for this exact part number. Work on a cool exhaust, support the vehicle safely, confirm all interfaces and clearances, align the system before final tightening, test for leaks, and inspect the installation again after the first heat cycle.
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