Description
Performance Header Upgrade: Replaces restrictive factory exhaust manifolds with a tuned tubular header designed to improve exhaust flow and engine efficiency.
Legendary 4.0L Jeep Fitment: Engineered for 1991–1999 Jeep Wrangler YJ and TJ, Cherokee XJ, Grand Cherokee ZJ, and Grand Cherokee WJ models equipped with the 4.0L inline-six gasoline engine.
Premium Stainless Steel Construction: Manufactured from high-quality stainless steel for superior corrosion resistance, strength, and long-term durability.
Improved Exhaust Scavenging: Tuned primary tubes help reduce backpressure and promote smoother exhaust flow for enhanced horsepower, torque, and throttle response.
Direct-Fit Performance Design: Engineered for reliable installation and seamless integration with compatible exhaust system components.
Additional Details
Enhance the performance and reliability of Jeep's legendary inline-six engine with the Gibson Stainless Steel Header . Designed specifically for 1991–1999 Jeep Wrangler YJ and TJ, Cherokee XJ, Grand Cherokee ZJ, and Grand Cherokee WJ models equipped with the 4.0L gasoline engine, this performance header replaces the restrictive factory exhaust manifold with a high-flow tubular design engineered to improve exhaust efficiency and engine breathing.
Constructed from premium stainless steel, the GP400S delivers outstanding resistance to corrosion, rust, and the extreme temperatures generated by the exhaust system. Its tuned runner design promotes improved exhaust scavenging and reduced backpressure, helping support gains in horsepower, torque, and throttle response across the RPM range. Built for long-term durability and dependable performance, this header also serves as an excellent replacement for aging or cracked factory manifolds. Whether restoring lost performance or upgrading for improved engine efficiency, the Gibson Stainless Steel Header delivers the quality craftsmanship and proven engineering Jeep enthusiasts expect.
Installation Notes
Installation Difficulty:
Skill Level 3 -
Advanced
Installation Time: 3-6 hours
Parts Included
Header
Gaskets
Hardware
Warranty
Limited Lifetime Warranty.
Specifications
- Color: Silver
- Motor: 6cyl 4.0L
- Material: Stainless Steel
- Shipping Weight: 30lb
- Shipping Dimensions: 19in x 16in x 8in (L x W x H)
Fitment
- 1999 Jeep Cherokee (XJ)
- 1998 Jeep Cherokee (XJ)
- 1997 Jeep Cherokee (XJ)
- 1996 Jeep Cherokee (XJ)
- 1995 Jeep Cherokee (XJ)
- 1994 Jeep Cherokee (XJ)
- 1993 Jeep Cherokee (XJ)
- 1992 Jeep Cherokee (XJ)
- 1991 Jeep Cherokee (XJ)
- 1999 Jeep Grand Cherokee (WJ)
- 1998 Jeep Grand Cherokee (ZJ)
- 1997 Jeep Grand Cherokee (ZJ)
- 1996 Jeep Grand Cherokee (ZJ)
- 1995 Jeep Grand Cherokee (ZJ)
- 1994 Jeep Grand Cherokee (ZJ)
- 1993 Jeep Grand Cherokee (ZJ)
- 1999 Jeep Wrangler (TJ)
- 1998 Jeep Wrangler (TJ)
- 1997 Jeep Wrangler (TJ)
- 1995 Jeep Wrangler (YJ)
- 1994 Jeep Wrangler (YJ)
- 1993 Jeep Wrangler (YJ)
- 1992 Jeep Wrangler (YJ)
- 1991 Jeep Wrangler (YJ)
Additional Information
Color: |
Silver |
Motor: |
6cyl 4.0L |
Material: |
Stainless Steel |
Compatible Vehicle: |
Cherokee XJ 1991-1999 |
Compatible Vehicle: |
Grand Cherokee WJ 1999 |
Compatible Vehicle: |
Grand Cherokee ZJ 1993-1998 |
Compatible Vehicle: |
Wrangler TJ 1997-1999 |
Compatible Vehicle: |
Wrangler YJ 1991-1995 |
