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This Gibson Headers GP129S are dyno-tuned stainless steel exhaust headers designed for 2002-2014 GM full-size trucks and SUVs with 4.8L 5.3L and 6.0L engines including Cadillac Escalade Chevrolet Silverado Tahoe Suburban Avalanche GMC Sierra Yukon and Hummer H2. These headers replace factory manifolds to unlock low and mid-range power gains improve exhaust flow and reduce underhood heat for better highway performance. Engineered for direct bolt-on installation with stock crossover pipes they fit street off-road lowered or lifted vehicles.
Key Features
- Direct Bolt-On Design: Uses OEM-style connections and stock crossover pipe with no welding required making it a plug-and-play upgrade.
- Mandrel-Bent 1-1/2in 16 Gauge T304 Stainless Tubing: Provides smooth exhaust flow for increased horsepower and torque at everyday RPMs while resisting corrosion for long-lasting durability.
- Mandrel-bent 16-gauge T304 stainless steel tubing with 2.5in collectors for strength corrosion resistance and optimal flow.
- 3/8in Heavy Duty Laser Cut Port Flanges: Ensures leak-free seals with no warping under high heat for reliable performance and easy installation.
- Bolt-on replacement takes 2-4 hours with basic tools no cutting or fabrication needed.
- Includes all necessary gaskets bolts and hardware for OEM connections.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2002-2013 | Cadillac | Escalade | 1500, 5.3L |
| 2002-2013 | Cadillac | Escalade | 1500, 6.2L |
| 2004-2007 | Chevrolet | Avalanche 1500 | 5.3L |
| 2009-2011 | Chevrolet | Avalanche 1500 | 5.3L |
| 2004-2013 | Chevrolet | Silverado 1500 | 4.8L |
| 2004-2013 | Chevrolet | Silverado 1500 | 5.3L |
| 2007-2012 | Chevrolet | Silverado 1500 | 6.0L |
| 2004-2010 | Chevrolet | Suburban 1500 | 4.8L |
| 2004-2008 | Chevrolet | Suburban 1500 | 5.3L |
| 2010-2013 | Chevrolet | Suburban 1500 | 5.3L |
| 2007-2013 | Chevrolet | Suburban 1500 | 6.2L |
| 2003-2010 | Chevrolet | Tahoe | 4.8L |
| 2003-2008 | Chevrolet | Tahoe | 5.3L |
| 2010-2013 | Chevrolet | Tahoe | 5.3L |
| 2007-2013 | Chevrolet | Tahoe | 6.2L |
| 2003-2013 | GMC | Sierra 1500 | 4.8L |
| 2003-2013 | GMC | Sierra 1500 | 5.3L |
| 2007-2012 | GMC | Sierra 1500 | 6.0L |
| 2003-2010 | GMC | Yukon | 4.8L |
| 2003-2008 | GMC | Yukon | 5.3L |
| 2010-2013 | GMC | Yukon | 5.3L |
| 2007-2013 | GMC | Yukon | 6.2L |
| 2007 | Hummer | H2 | 6.0L |
| 2009-2010 | Hummer | H2 | 6.2L |
Specifications
| Manufacturer | Gibson |
|---|---|
| Manufacturer Part Number | GP129S |
| Product Type | Headers &, Manifolds |
| Fitment Type | Vehicle specific |
| Tubing Diameter | 1.50-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
- One new Gibson headers &, manifolds in the exact configuration identified by manufacturer part number GP129S
- 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.
Related Gibson Products
- Gibson 02-05 Cadillac Escalade Base 5.3L 1-1/2in 16 Gauge Performance Header - Ceramic Coated
- Gibson 02-06 Cadillac Escalade Base 6.0L 1-5/8in 16 Gauge Performance Header - Stainless
- Gibson 02-06 Cadillac Escalade Base 6.0L 1-5/8in 16 Gauge Performance Header - Ceramic Coated
Browse the Gibson collection for related exhaust systems and components.
Frequently Asked Questions
Which vehicles fit Gibson GIBGP129S?
Gibson GIBGP129S is listed for 2002-2013 Cadillac Escalade, 2003-2013 Chevrolet Tahoe, 2003-2013 GMC Sierra 1500, 2003-2013 GMC Yukon, 2004-2007 Chevrolet Avalanche 1500, 2004-2013 Chevrolet Silverado 1500, 2004-2013 Chevrolet Suburban 1500, 2007 Hummer H2, 2009-2010 Hummer H2, and 2009-2011 Chevrolet Avalanche 1500. 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 GIBGP129S?
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 GIBGP129S?
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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