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This Gibson Headers deliver dyno-tuned power gains for 2007-2011 Jeep Wrangler JK models with 3.8L engines including Rubicon Sahara Sport and Unlimited variants. These stainless headers replace factory manifolds using the stock crossover pipe for unrestricted exhaust flow more horsepower and torque at low to mid-range RPMs and lower engine temperatures. Engineered for street off-road lowered or lifted JK Wranglers with direct bolt-on installation.
Key Features
- 1-1/2in 16 Gauge Stainless Tubing: Mandrel-bent for smooth exhaust flow corrosion resistance and long-lasting durability.
- Dyno-Tuned Design: Tested to increase usable horsepower and torque at highway speeds improving throttle response and acceleration.
- Direct Factory Replacement: Bolts up using OEM connections and stock crossover pipe no modifications needed for seamless fit.
- Reduces engine operating temperatures for consistent performance during extended drives.
- No welding required uses factory hardware locations and stock exhaust crossover.
- Bolts directly to OEM catalytic converters and mid-pipes with included gaskets and bolts.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2007-2011 | Jeep | Wrangler | JK, 3.8L |
Specifications
| Manufacturer | Gibson |
|---|---|
| Manufacturer Part Number | GP403S |
| Product Type | Headers &, Manifolds |
| Fitment Type | Vehicle specific |
| Tubing Diameter | 1.50-in. Stainless 16-gauge mandrel bent tubing. |
| Header Features | Short Tube Style Header, Direct Fit, Bolt-On, Heavy duty laser cut flanges, Premium gaskets and all hardware included, No Welding, Attaches to the OEM crossover pipe |
| Footnote | Emission Compliant Carb EO# D-411-12 |
| Warranty | Lifetime Limited Warranty |
What's Included
- One new Gibson headers &, manifolds in the exact configuration identified by manufacturer part number GP403S
- Hardware and accessories only when supplied for this exact part number
About Gibson
Gibson develops vehicle-specific and universal exhaust components for street, truck, SUV, and performance applications. Selection and installation requirements remain exact-part-number specific.
Related Gibson Products
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- Gibson 91-99 Jeep Cherokee Base 4.0L 1-1/2in 16 Gauge Performance Header - Stainless
Browse the Gibson collection for related exhaust systems and components.
Frequently Asked Questions
Which vehicles fit Gibson GIBGP403S?
Gibson GIBGP403S is listed for 2007-2011 Jeep Wrangler. Confirm the exact engine, trim, drivetrain, body or cab configuration, exhaust layout, and every application note before ordering.
What should I verify before ordering Gibson GIBGP403S?
Match the exact part number, system type, material, finish, tubing and connection diameters, exhaust configuration, package contents, and current manufacturer notes shown in this listing.
What should be checked when installing Gibson GIBGP403S?
Verify all interfaces, hanger positions, tip and body clearances, clamp or fastener torque, leak-free operation, and local emissions requirements. Reinspect the system after its first heat cycle.
Installation Instructions
Follow the current Gibson instructions and vehicle service information for this exact part number. Work on a cool exhaust, support the vehicle safely, confirm all interfaces and clearances, align the system before final tightening, test for leaks, and inspect the installation again after the first heat cycle.
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