Injen Performance Header

1997–2006 Jeep Wrangler 4.0L 6-Cylinder

PF5001WB

Overview:

The Injen Performance Header with Diamond Plate Heat Shield is engineered to enhance the power and efficiency of your Jeep Wrangler from 1997 to 2006. Designed for enthusiasts seeking to unlock additional horsepower and torque, this header system improves exhaust flow while maintaining optimal air-fuel ratios without requiring additional tuning. Whether you own a Wrangler Sport, Sahara, SE, Rubicon, or Unlimited model within the specified years, this header is a direct-fit upgrade that delivers noticeable performance gains and an aggressive engine tone.

Built by Injen Technology, a leader in high-performance automotive parts, this header is ideal for Jeep owners who want to add excitement and responsiveness to their ride while ensuring durability and reliability. The included diamond plate heat shield protects vital components from excessive heat, contributing to consistent performance and longevity.

Key Features:

This Injen header system combines advanced engineering with quality materials to provide a superior upgrade for your Jeep Wrangler. Key features include:

• Power gains of up to +10.9 horsepower and +11.3 ft-lbs of torque, verified on the dyno
• Diamond plate heat shield included to reduce heat soak and protect engine bay components
• Precision-engineered smooth tubing to eliminate exhaust restrictions and improve flow
• Maintains proper air-fuel ratios with no additional tuning required
• Wrinkle black finish for a durable, aggressive appearance
• Direct-fit design for easy installation on Jeep Wrangler 1997–2006 models
• Compatible with 4.0L 6-cylinder engines, including Rubicon, Sahara, SE, Sport, Unlimited, and X trims
• Includes Injen’s limited lifetime warranty for peace of mind

Construction & Design:

The header is crafted from premium T6-6061 aluminum tubing, known for its strength, lightweight properties, and excellent heat dissipation. This material choice ensures the header withstands the rigors of off-road and street driving while contributing to improved exhaust flow dynamics. The diamond plate heat shield is designed to deflect heat away from critical engine components, helping to maintain cooler under-hood temperatures and protect sensitive electronics and wiring.

Injen’s engineering focuses on smooth bends and optimized tube diameters to minimize turbulence and backpressure, resulting in more efficient exhaust scavenging. The wrinkle black finish not only enhances corrosion resistance but also provides a rugged aesthetic that complements the Jeep’s adventurous spirit.

Performance & Sound

Installing this Injen header delivers measurable performance improvements, with dyno-proven gains of up to 10.9 horsepower and 11.3 ft-lbs of torque. These enhancements translate into quicker throttle response, improved acceleration, and better overall engine efficiency. Additionally, the header produces a more aggressive and refined engine tone under full throttle, giving your Jeep a commanding presence on and off the road.

Installation & Fitment:

This header is designed as a direct-fit replacement for Jeep Wrangler models equipped with the 4.0L 6-cylinder engine from 1997 through 2006. Installation requires no modifications, making it accessible for experienced DIYers and professional installers alike. The kit includes all necessary hardware and detailed instructions to ensure a smooth and straightforward installation process.

What's Included:

• Injen Performance Header with T6-6061 aluminum tubing
• Diamond Plate Heat Shield
• Mounting hardware and brackets
• Installation instructions

Ideal For:

This header system is perfect for Jeep Wrangler owners looking to enhance engine performance without complex tuning or modifications. It suits daily drivers, off-road enthusiasts, and anyone seeking a reliable power upgrade that also improves exhaust sound and engine bay aesthetics. Whether you’re upgrading a stock vehicle or building a performance-focused Jeep, this Injen header delivers tangible benefits.

Emissions Note

This product carries CARB Executive Order #D-476-6, ensuring it meets California emissions standards for applicable models. It is compliant with emissions regulations for the specified Jeep Wrangler years and engine configurations.

Injen is a performance intake and airflow brand best known for dyno-proven cold air intakes and intake systems built for enthusiast street and track builds. Their catalog spans intake kits, filters, and supporting components designed to increase airflow, sharpen throttle response, and add a more aggressive induction note.