Gibson 2002-2006 Cadillac, Chevrolet, GMC & Hummer (6.0L) 1-5/8in 16 Gauge Stainless Performance Header GP500S

Fits select 2002-2006 Cadillac, Chevrolet, GMC, and Hummer trucks and SUVs (6.0L).

Gibson Performance headers are dyno-tuned and engineered to improve engine breathing, delivering increased low-to-mid-range horsepower and torque for highway speeds and towing. Designed as a direct bolt-on replacement for restrictive factory manifolds, these headers utilize the stock crossover pipe and OEM-style connections for a straightforward installation without welding. The 1-5/8 inch mandrel-bent tubing and heavy-duty 3/8 inch laser-cut flanges ensure a precision fit and a leak-free seal that resists warping under high heat.

• Construction: Heavy-duty 409L stainless 16-gauge tubing
• Flanges: 3/8-inch thick laser-cut port flanges for maximum durability
• Performance: Mandrel-bent tubing for optimized exhaust scavenging
• Compliance: 50-state street legal; meets EPA and CARB requirements
• Installation: Direct replacement using OEM connections; no welding required
• Included: Premium gaskets and hardware
• Manufacturer Part Number: GP500S

Whether your vehicle is stock, lowered, or lifted, Gibson headers provide cooler operating temperatures and reliable performance for street and off-road applications alike.