Gibson Performance Header for Chevrolet Silverado 3500 8.1L – Stainless Steel, Part Number GP131S

Description

The Gibson GP131S performance header is engineered to enhance the power and efficiency of your Chevrolet Silverado 3500 equipped with an 8.1L engine. Designed as a direct replacement for the factory manifolds, this header features mandrel-bent 16-gauge 409L stainless steel tubing that improves exhaust flow, resulting in increased horsepower and torque at low and mid-range RPM highway speeds. The header’s precision 3/8-inch heavy-duty laser-cut port flanges ensure a secure, warp-free seal, eliminating leaks and maintaining optimal engine performance. Built with OEM style connections and premium gaskets and hardware, installation is straightforward without the need for welding, making it suitable for both street and off-road applications. The inclusion of an EGR fitting and compatibility with the stock crossover pipe ensures seamless integration with your vehicle’s existing systems. Certified as 50-state street legal, this performance header meets EPA and CARB requirements, providing you with a legal upgrade that won’t affect your factory warranty. The stainless steel construction also offers excellent durability and resistance to corrosion, ensuring long-lasting performance. Backed by a lifetime limited warranty, the Gibson GP131S is an ideal upgrade for those seeking increased power, improved exhaust flow, and a durable, quality-made header that meets strict emissions standards.

Features:

• Heavy Duty 3/8 inch Thick Laser Cut Port Flanges for a secure seal

• Made from Heavy Duty 409L Stainless Steel 16 Gauge Tubing for durability and corrosion resistance

• Premium gaskets and hardware included for easy installation

• Uses OEM style connections for seamless fitment

• Mandrel bent tubing to optimize exhaust flow

• No welding required for installation

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