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This Gibson GP131S performance headers deliver dyno-tuned power gains for 2001-2003 Chevrolet Silverado 3500, 2500 HD, Avalanche 2500, Suburban 2500 and GMC Sierra 2500 HD, 3500, Yukon XL 2500 with 8.1L engines. These stainless steel headers replace factory manifolds to increase horsepower and torque at low and mid-range RPM while reducing engine temperatures. Direct bolt-on design uses stock crossover pipe for easy upgrade on street or off-road trucks.
Key Features
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2002-2003 | Chevrolet | Avalanche 2500 | 8.1L |
| 2001-2003 | Chevrolet | Silverado 2500 HD | 8.1L |
| 2001-2003 | Chevrolet | Suburban 2500 | 8.1L |
| 2001-2003 | GMC | Sierra 2500 HD | 8.1L |
| 2001-2003 | GMC | Yukon XL 2500 | 8.1L |
Specifications
| Manufacturer | Gibson |
|---|---|
| Manufacturer Part Number | GP131S |
| Product Type | Headers &, Manifolds |
| Fitment Type | Vehicle specific |
| Tubing Diameter | 1-3/4-in. Stainless 16-gauge mandrel bent tubing. |
| Header Features | Short Tube Style Header, Direct Fit, Bolt-On, Heavy duty laser cut flanges, Premium gaskets and all hardware included, No Welding, Attaches to the OEM crossover pipe |
| Footnote | Emission Compliant Carb EO# D-411-13 |
| Warranty | Lifetime Limited Warranty |
What's Included
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 GIBGP131S?
Gibson GIBGP131S is listed for 2001-2003 Chevrolet Silverado 2500 HD, 2001-2003 Chevrolet Suburban 2500, 2001-2003 GMC Sierra 2500 HD, 2001-2003 GMC Yukon XL 2500, and 2002-2003 Chevrolet Avalanche 2500. 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 GIBGP131S?
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 GIBGP131S?
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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