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Gibson 05-06 Chevrolet Avalanche 2500 LS 8.1L 1-3/4in 16 Gauge Performance Header - Ceramic Coated

Unleash the full potential of your Chevrolet Avalanche with the Gibson Performance Header. Dyno-tuned and engineered to deliver more usable horsepower and torque at low and mid-range RPM highway speeds, this header improves your engine's ability to breathe and maintains a cooler operating temperature.

Designed as a direct replacement for the factory manifolds, this header uses the stock crossover pipe and is well suited for lowered and raised vehicles, street and off-road. With its 50-state street legal status, you can drive with confidence, knowing you meet EPA and CARB requirements without affecting your factory warranty.

  • 3/8" Heavy Duty Laser Cut Port Flanges for a leak-free connection
  • Premium Gaskets and Hardware included for a hassle-free installation
  • Backed by a Lifetime Limited Warranty for peace of mind
Make Model Year Type
Chevrolet Avalanche 2500 2004 Base
Chevrolet Avalanche 2500 2005 LS
Chevrolet Avalanche 2500 2005 LT
Chevrolet Avalanche 2500 2006 LS
Chevrolet Avalanche 2500 2006 LT
Chevrolet Silverado 2500 HD 2004 Base
Chevrolet Silverado 2500 HD 2004 LS
Chevrolet Silverado 2500 HD 2004 LT
Chevrolet Silverado 2500 HD 2004 WT
Chevrolet Silverado 2500 HD 2005 Base
Chevrolet Silverado 2500 HD 2005 LS
Chevrolet Silverado 2500 HD 2005 LT
Chevrolet Silverado 2500 HD 2005 WT
Chevrolet Silverado 3500 2004 Base
Chevrolet Silverado 3500 2004 LS
Chevrolet Silverado 3500 2004 LT
Chevrolet Silverado 3500 2004 WT
Chevrolet Silverado 3500 2005 Base
Chevrolet Silverado 3500 2005 LS
Chevrolet Silverado 3500 2005 LT
Chevrolet Suburban 2500 2004 LS
Chevrolet Suburban 2500 2004 LT
Chevrolet Suburban 2500 2005 LS
Chevrolet Suburban 2500 2005 LT
GMC Sierra 2500 HD 2004 Base
GMC Sierra 2500 HD 2004 SLE
GMC Sierra 2500 HD 2004 SLT
GMC Sierra 2500 HD 2004 WT
GMC Sierra 2500 HD 2005 Base
GMC Sierra 2500 HD 2005 SLE
GMC Sierra 2500 HD 2005 SLT
GMC Sierra 2500 HD 2005 WT
GMC Sierra 3500 2004 Base
GMC Sierra 3500 2004 SLE
GMC Sierra 3500 2004 SLT
GMC Sierra 3500 2004 WT
GMC Sierra 3500 2005 Base
GMC Sierra 3500 2005 SLE
GMC Sierra 3500 2005 SLT
GMC Sierra 3500 2005 WT
GMC Yukon XL 2500 2004 SLE
GMC Yukon XL 2500 2004 SLT
GMC Yukon XL 2500 2005 SLE
GMC Yukon XL 2500 2005 SLT
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