Gibson Performance Header

2007–2011 Jeep Wrangler JK 3.8L V6

Part #: GP403S

Overview

The Gibson Stainless Steel Performance Header is a direct replacement exhaust header designed specifically for the 2007 through 2011 Jeep Wrangler JK equipped with the 3.8L V6 engine. Engineered to improve exhaust flow efficiency, this header enhances horsepower and torque, particularly in the low to mid-range RPMs where everyday driving and off-road conditions demand responsive power. Whether you own a Sport, Sahara, Rubicon, Unlimited, or 70th Anniversary edition, this header delivers reliable performance gains while maintaining factory warranty coverage and full emissions compliance.

Built to withstand both street and off-road use, the Gibson Performance Header is an ideal upgrade for Jeep enthusiasts seeking improved throttle response, cooler engine operation, and a more aggressive exhaust note without sacrificing legal street use.

Key Features

Designed with precision and durability, the Gibson Performance Header offers the following key features:

• Heavy-duty 3/8 inch thick laser-cut port flanges for a perfect seal, preventing warping and exhaust leaks
• Constructed from premium 409L stainless steel with 16-gauge tubing for superior corrosion resistance and longevity
• Mandrel bent tubing maintains consistent diameter through bends to optimize exhaust flow and maximize performance
• OEM-style connections enable a straightforward bolt-on installation with no welding required
• Includes premium exhaust gaskets and all necessary mounting hardware for a complete upgrade
• Compatible with the factory crossover pipe for seamless integration with existing exhaust components
• Backed by a lifetime limited warranty for peace of mind
• Meets EPA and CARB emissions standards, ensuring 50-state street legality

Construction & Design

The Gibson Performance Header is expertly crafted from heavy-duty 409L stainless steel, known for its excellent resistance to rust, corrosion, and high heat. The 16-gauge tubing is mandrel bent to preserve a smooth, consistent diameter throughout all bends, reducing exhaust flow restrictions and enhancing engine efficiency. The precision laser-cut 3/8 inch thick port flanges ensure a perfect fit against the cylinder head, eliminating common issues such as warping or exhaust leaks that can degrade performance over time.

This robust construction guarantees durability and longevity, making it suitable for the demanding conditions of both street driving and off-road adventures.

Performance & Sound

By improving the engine’s ability to expel exhaust gases more efficiently, the Gibson header increases usable horsepower and torque, especially noticeable at low and mid-range RPMs typical of highway cruising and daily driving. This results in a more responsive throttle and smoother power delivery. Additionally, the enhanced exhaust flow helps reduce engine temperatures, promoting better overall engine health and reliability. The header also produces a more aggressive exhaust tone, enhancing the driving experience without introducing excessive drone inside the cabin.

Installation & Fitment

The Gibson Stainless Steel Performance Header is designed as a direct bolt-on replacement for the factory exhaust manifolds on Jeep Wrangler JK models from 2007 to 2011 with the 3.8L V6 engine. Featuring OEM-style connections, it fits seamlessly with the stock crossover pipe and requires no welding or modifications. Installation is straightforward and can be completed using basic hand tools, making it accessible for both professional installers and experienced enthusiasts.

This header is compatible with a wide range of Wrangler trims, including Sport, Sahara, Rubicon, Unlimited, and 70th Anniversary editions, ensuring a perfect fit and reliable performance.

What's Included

• Gibson Stainless Steel Performance Header
• Premium exhaust gaskets
• All necessary mounting hardware
• Installation instructions

Ideal For

• Jeep Wrangler owners seeking improved horsepower and torque without compromising emissions compliance
• Drivers wanting a durable, long-lasting exhaust upgrade suitable for both street and off-road use
• Enthusiasts looking for a direct-fit, no-weld performance header for 2007–2011 Wrangler JK models
• Those who prefer a high-quality stainless steel header that maintains factory warranty and legal status

Emissions Note

This Gibson Performance Header is fully compliant with EPA and CARB emissions standards, making it legal for use on all 50 states’ roads. It does not affect your vehicle’s factory warranty, providing a reliable and emissions-friendly upgrade for daily driving and off-road adventures alike.