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 in. Heavy Duty Laser Cut Port Flanges- No Warping or Leaking. Premium Gaskets and Hardware included. Backed by a Lifetime Limited Warranty.
This Part Fits:
        
       This Part Fits:
| Year | Make | Model | Submodel | 
|---|---|---|---|
| 1999-2001 | Chevrolet | Silverado 1500 | Base | 
| 1999-2001 | Chevrolet | Silverado 1500 | LS | 
| 1999-2001 | Chevrolet | Silverado 1500 | LT | 
| 1999-2000 | Chevrolet | Silverado 2500 | Base | 
| 1999-2000 | Chevrolet | Silverado 2500 | LS | 
| 1999-2000 | Chevrolet | Silverado 2500 | LT | 
| 2000-2001 | Chevrolet | Suburban 1500 | Base | 
| 2000-2001 | Chevrolet | Suburban 1500 | LS | 
| 2000-2001 | Chevrolet | Suburban 1500 | LT | 
| 2000-2001 | Chevrolet | Tahoe | Base | 
| 2000-2001 | Chevrolet | Tahoe | LS | 
| 2000-2001 | Chevrolet | Tahoe | LT | 
| 1999-2001 | GMC | Sierra 1500 | SL | 
| 1999-2001 | GMC | Sierra 1500 | SLE | 
| 1999-2001 | GMC | Sierra 1500 | SLT | 
| 1999-2000 | GMC | Sierra 2500 | SL | 
| 1999-2000 | GMC | Sierra 2500 | SLE | 
| 1999-2000 | GMC | Sierra 2500 | SLT | 
| 2000-2001 | GMC | Yukon | SLE | 
| 2000-2001 | GMC | Yukon | SLT | 
| 2000-2001 | GMC | Yukon XL 1500 | SLE | 
| 2000-2001 | GMC | Yukon XL 1500 | SLT |