Gibson 01-03 Chevrolet Silverado 3500 Base 8.1L 1-3/4in 16 Gauge Performance Header - Stainless

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. With EGR Fitting; With Out Air Injection; automatic only. Fitment: Chevrolet Avalanche 2500 Base 2002 Chevrolet Avalanche 2500 Base 2003 Chevrolet Silverado 2500 HD Base 2001 Chevrolet Silverado 2500 HD Base 2002 Chevrolet Silverado 2500 HD Base 2003 Chevrolet Silverado 2500 HD LS 2001 Chevrolet Silverado 2500 HD LS 2002 Chevrolet Silverado 2500 HD LS 2003 Chevrolet Silverado 2500 HD LT 2001 Chevrolet Silverado 2500 HD LT 2002 Chevrolet Silverado 2500 HD LT 2003 Chevrolet Silverado 3500 Base 2001 Chevrolet Silverado 3500 Base 2002 Chevrolet Silverado 3500 Base 2003 Chevrolet Silverado 3500 LS 2001 Chevrolet Silverado 3500 LS 2002 Chevrolet Silverado 3500 LS 2003 Chevrolet Silverado 3500 LT 2001 Chevrolet Silverado 3500 LT 2002 Chevrolet Silverado 3500 LT 2003 Chevrolet Suburban 2500 Base 2001 Chevrolet Suburban 2500 LS 2001 Chevrolet Suburban 2500 LS 2002 Chevrolet Suburban 2500 LS 2003 Chevrolet Suburban 2500 LT 2001 Chevrolet Suburban 2500 LT 2002 Chevrolet Suburban 2500 LT 2003 GMC Sierra 2500 HD Base 2002 GMC Sierra 2500 HD Base 2003 GMC Sierra 2500 HD SL 2001 GMC Sierra 2500 HD SL 2002 GMC Sierra 2500 HD SLE 2001 GMC Sierra 2500 HD SLE 2002 GMC Sierra 2500 HD SLE 2003 GMC Sierra 2500 HD SLT 2001 GMC Sierra 2500 HD SLT 2002 GMC Sierra 2500 HD SLT 2003 GMC Sierra 2500 HD WT 2003 GMC Sierra 3500 Base 2002 GMC Sierra 3500 Base 2003 GMC Sierra 3500 SL 2001 GMC Sierra 3500 SL 2002 GMC Sierra 3500 SLE 2001 GMC Sierra 3500 SLE 2002 GMC Sierra 3500 SLE 2003 GMC Sierra 3500 SLT 2001 GMC Sierra 3500 SLT 2002 GMC Sierra 3500 SLT 2003 GMC Yukon XL 2500 SLE 2001 GMC Yukon XL 2500 SLE 2002 GMC Yukon XL 2500 SLE 2003 GMC Yukon XL 2500 SLT 2001 GMC Yukon XL 2500 SLT 2002 GMC Yukon XL 2500 SLT 2003