Gibson GP400S-C Ceramic Coated Long Tube Performance Header

The Gibson GP400S-C is a dyno-tuned, ceramic coated performance exhaust header engineered to deliver measurable gains in horsepower and torque right where you need them — at low and mid-range RPM highway speeds. Built from heavy-duty 409L stainless steel with 1-1/2" mandrel-bent primary tubing, this long tube header replaces your factory exhaust manifold and significantly improves exhaust scavenging for better engine breathing and cooler operating temperatures.

Designed as a direct bolt-on replacement for the factory manifold, the GP400S-C uses the stock crossover pipe and OEM-style connections — no welding required. The silver ceramic coating provides excellent heat resistance and long-lasting corrosion protection while giving the header a clean, finished appearance under the hood.

Key Features:

• Dyno-tuned for maximum horsepower and torque gains at low and mid-range RPM
• Heavy-duty 409L stainless steel with 1-1/2" mandrel-bent primary tubing
• 16-gauge stainless steel construction for durability
• Silver ceramic coating for superior heat resistance and corrosion protection
• 3/8" heavy-duty laser cut port flanges — no warping or leaking
• Direct bolt-on replacement for factory manifold using the stock crossover pipe
• OEM-style connections — no welding required
• Well-suited for both lowered and raised vehicles, street and off-road use
• Premium gaskets and all hardware included
• 50-state street legal — meets EPA and CARB requirements (CARB EO# D-411-12)
• Will not affect factory warranty

The Gibson GP400S-C is backed by a Lifetime Limited Warranty and includes an installation instruction manual. UPC: 677418009750.