Every Gibson Performance Header is Dyno-tuned and engineered to deliver more usable horsepower and torque at low and mid-range RPM highway speeds. Improves engines ability to breathe and cooler operating engine temperature. Designed as a direct replacement for the factory manifolds, using the stock crossover pipe. They are well suited for lowered and raised vehicles, street and off-road. 50 State Street legal. Meets EPA and CARB requirements. Will not affect the factory warranty. No welding required. Uses OEM style connections. 3/8" Heavy Duty Laser Cut Port Flanges- No Warping or Leaking. Premium Gaskets and Hardware included. Backed by a Lifetime Limited Warranty.

This Part Fits:

Year	Make	Model	Submodel
2004	Chevrolet	Avalanche 2500	Base
2005-2006	Chevrolet	Avalanche 2500	LS
2005-2006	Chevrolet	Avalanche 2500	LT
2004-2005	Chevrolet	Silverado 2500 HD	Base
2004-2005	Chevrolet	Silverado 2500 HD	LS
2004-2005	Chevrolet	Silverado 2500 HD	LT
2004-2005	Chevrolet	Silverado 2500 HD	WT
2004-2005	Chevrolet	Silverado 3500	Base
2004-2005	Chevrolet	Silverado 3500	LS
2004-2005	Chevrolet	Silverado 3500	LT
2004	Chevrolet	Silverado 3500	WT
2004-2005	Chevrolet	Suburban 2500	LS
2004-2005	Chevrolet	Suburban 2500	LT
2004-2005	GMC	Sierra 2500 HD	Base
2004-2005	GMC	Sierra 2500 HD	SLE
2004-2005	GMC	Sierra 2500 HD	SLT
2004-2005	GMC	Sierra 2500 HD	WT
2004-2005	GMC	Sierra 3500	Base
2004-2005	GMC	Sierra 3500	SLE
2004-2005	GMC	Sierra 3500	SLT
2004-2005	GMC	Sierra 3500	WT
2004-2005	GMC	Yukon XL 2500	SLE
2004-2005	GMC	Yukon XL 2500	SLT