Gibson Exhaust 2004–2006 Avalanche, Yukon XL, Silverado & Sierra 2500HD 8.1L Performance Exhaust Headers – Stainless Steel – GP134S

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.

• 1.50-in. Stainless 16-gauge mandrel bent tubing.
• Lifetime Limited Warranty
• 50 State Legal / California Emissions Compliant