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Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
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Gibson
Gibson Performance Header 1-3/4 in. 16 Gauge 409L Stainless Steel for 2001-2003 Chevrolet/GMC (8.1L) GP131S
$1,496.70
This product will be available for sale in 2 weeks, but you can pre-order now to receive 10% discount!
Fits select 2001-2003 Chevrolet Silverado 2500 HD/3500, Suburban 2500, Avalanche 2500, and GMC Sierra 2500 HD/3500, Yukon XL 2500 (8.1L).
Gibson Performance Headers are dyno-tuned to maximize low-to-mid range torque and horsepower, making them an ideal upgrade for towing, heavy-duty hauling, and highway performance. Engineered as a direct bolt-on replacement for restrictive factory manifolds, these headers maintain compatibility with your stock crossover pipe and OEM-style connections. The mandrel-bent 16-gauge 409L stainless steel tubing ensures smooth exhaust flow and long-term durability in harsh environments.
Each header features heavy-duty 3/8-inch thick laser-cut port flanges to prevent warping and exhaust leaks. Designed for a straightforward installation with no welding required, this kit includes premium gaskets and all necessary hardware to complete the job. These headers are 50-state street legal, meeting both EPA and CARB requirements, and are backed by a Lifetime Limited Warranty.
- Part Number: GP131S
- Material: 16-Gauge 409L Stainless Steel
- Primary Diameter: 1-3/4 in.
- Flange Thickness: 3/8 in. Laser-Cut
- Compliance: 50-State Street Legal (EPA & CARB)
- Installation: Direct bolt-on; no welding required
- Includes: Premium gaskets and mounting hardware
🔧 Fitment & Compatibility
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2003 | Chevrolet | Avalanche 2500 | Base |
| 2001-2003 | Chevrolet | Silverado 2500 HD | Base |
| 2001-2003 | Chevrolet | Silverado 2500 HD | LS |
| 2001-2003 | Chevrolet | Silverado 2500 HD | LT |
| 2001-2003 | Chevrolet | Silverado 3500 | Base |
| 2001-2003 | Chevrolet | Silverado 3500 | LS |
| 2001-2003 | Chevrolet | Silverado 3500 | LT |
| 2001 | Chevrolet | Suburban 2500 | Base |
| 2001-2003 | Chevrolet | Suburban 2500 | LS |
| 2001-2003 | Chevrolet | Suburban 2500 | LT |
| 2002-2003 | GMC | Sierra 2500 HD | Base |
| 2001-2002 | GMC | Sierra 2500 HD | SL |
| 2001-2003 | GMC | Sierra 2500 HD | SLE |
| 2001-2003 | GMC | Sierra 2500 HD | SLT |
| 2003 | GMC | Sierra 2500 HD | WT |
| 2002-2003 | GMC | Sierra 3500 | Base |
| 2001-2002 | GMC | Sierra 3500 | SL |
| 2001-2003 | GMC | Sierra 3500 | SLE |
| 2001-2003 | GMC | Sierra 3500 | SLT |
| 2001-2003 | GMC | Yukon XL 2500 | SLE |
| 2001-2003 | GMC | Yukon XL 2500 | SLT |
Choose your Location
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Atlus
1340 Cobb Dr, Unit 1, Eustis, FL 32736
352-234-4458
Mon – Fri: 8:30 am – 4:30 pm
Sat: 9:00 am – 2:00 pm
Sun: Closed
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If you can find the part for a lower price from an authorized dealer/shop, we'll match the price! Reach out to Hello@AtlusAuto.com, our live chat located at the bottom right of your screen, or request an Atlas Price Guarantee, or visit our dedicated APG page to submit a request.
Gibson Performance Header 1-3/4 in. 16 Gauge 409L Stainless Steel for 2001-2003 Chevrolet/GMC (8.1L) GP131S
$1,496.70
This product will be available soon, but you can pre-order now to get on the list before others!
US Based Support - In Florida
30 Days Satisfaction Guarantee
Price Match
If you can find the part for a lower price from an authorized dealer/shop, we'll match the price! Reach out to Hello@AtlusAuto.com, our live chat located at the bottom of your screen, or request an Atlas Price Guarantee, or visit our dedicated APG page to submit a request.
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$1,496.70
$1,496.70
$1,496.70
Fits select 2001-2003 Chevrolet Silverado 2500 HD/3500, Suburban 2500, Avalanche 2500, and GMC Sierra 2500 HD/3500, Yukon XL 2500 (8.1L).
Gibson Performance Headers are dyno-tuned to maximize low-to-mid range torque and horsepower, making them an ideal upgrade for towing, heavy-duty hauling, and highway performance. Engineered as a direct bolt-on replacement for restrictive factory manifolds, these headers maintain compatibility with your stock crossover pipe and OEM-style connections. The mandrel-bent 16-gauge 409L stainless steel tubing ensures smooth exhaust flow and long-term durability in harsh environments.
Each header features heavy-duty 3/8-inch thick laser-cut port flanges to prevent warping and exhaust leaks. Designed for a straightforward installation with no welding required, this kit includes premium gaskets and all necessary hardware to complete the job. These headers are 50-state street legal, meeting both EPA and CARB requirements, and are backed by a Lifetime Limited Warranty.
- Part Number: GP131S
- Material: 16-Gauge 409L Stainless Steel
- Primary Diameter: 1-3/4 in.
- Flange Thickness: 3/8 in. Laser-Cut
- Compliance: 50-State Street Legal (EPA & CARB)
- Installation: Direct bolt-on; no welding required
- Includes: Premium gaskets and mounting hardware
🔧 Fitment & Compatibility
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2003 | Chevrolet | Avalanche 2500 | Base |
| 2001-2003 | Chevrolet | Silverado 2500 HD | Base |
| 2001-2003 | Chevrolet | Silverado 2500 HD | LS |
| 2001-2003 | Chevrolet | Silverado 2500 HD | LT |
| 2001-2003 | Chevrolet | Silverado 3500 | Base |
| 2001-2003 | Chevrolet | Silverado 3500 | LS |
| 2001-2003 | Chevrolet | Silverado 3500 | LT |
| 2001 | Chevrolet | Suburban 2500 | Base |
| 2001-2003 | Chevrolet | Suburban 2500 | LS |
| 2001-2003 | Chevrolet | Suburban 2500 | LT |
| 2002-2003 | GMC | Sierra 2500 HD | Base |
| 2001-2002 | GMC | Sierra 2500 HD | SL |
| 2001-2003 | GMC | Sierra 2500 HD | SLE |
| 2001-2003 | GMC | Sierra 2500 HD | SLT |
| 2003 | GMC | Sierra 2500 HD | WT |
| 2002-2003 | GMC | Sierra 3500 | Base |
| 2001-2002 | GMC | Sierra 3500 | SL |
| 2001-2003 | GMC | Sierra 3500 | SLE |
| 2001-2003 | GMC | Sierra 3500 | SLT |
| 2001-2003 | GMC | Yukon XL 2500 | SLE |
| 2001-2003 | GMC | Yukon XL 2500 | SLT |
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