Gibson Exhaust 2001–2003 Avalanche 8.1L; 2001–2003 Suburban/Yukon XL 2500 8.1L; 2001–2003 Silverado/Sierra 2500HD 8.1L Pickup Performance Header, Ceramic – GP113S-C

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 engine's 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.

• 1-3/4-in. Stainless 16-gauge mandrel bent tubing.
• With Out Air Injection; With Out EGR.
• Lifetime Limited Warranty
• 50 State Legal / California Emissions Compliant