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Gibson GP400S Stainless Steel Header for 91-99 Jeep Wrangler YJ, TJ & (Grand) Cherokee XJ, ZJ, WJ with 4.0L I-6 Gasoline Engine

Catalog #: 17666.101
Gibson Part #: GP400S
This Gibson Performance Stainless Header has been dyno-tuned and engineered to provide more horsepower and torque to your Jeep 4.0L engine. Gains are noticeable at low and mid-range RPM. The smooth flow of the mandrel bent, 16-gauge Stainless steel opens up your exhaust while providing durability and long life. 3/8" heavy duty laser cut port flanges provide you with a header that does not warp or leak - quite the upgrade over the factory, crack-prone exhaust manifold! Bolt on header, 50-State Legal, and made in the USA! What more can you ask for?

CARB Notice

  • 50 State Legal - CARB E.O. Number D-411-8

Quality You Can Trust: Gibson products are made in the USA and backed by a Limited Lifetime Warranty!

CARB Compliant: This exhaust is CARB compliant for use in all 50-States

Superior Strength: Replace or upgrade your factory exhaust manifold with this 16-guage stainless steel header.

Powahhh! Increase low and mid-range torque.

Installation Notes
Installation Difficulty:
Level 3Advanced
Installation Time: 3-6 hours
Parts Included
  • Header
  • Gaskets
  • Hardware
Limited Lifetime Warranty.
  • Features: High Temp Coating
  • Color: Black
  • Motor: 6cyl 4.0L
  • Material: Steel
  • Jeep Cherokee (XJ)

  • 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)
  • Jeep Grand Cherokee (WJ)

  • 1999 Jeep Grand Cherokee (WJ)
  • Jeep Grand Cherokee (ZJ)

  • 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)
  • Jeep Wrangler (TJ)

  • 1999 Jeep Wrangler (TJ)
  • 1998 Jeep Wrangler (TJ)
  • 1997 Jeep Wrangler (TJ)
  • Jeep Wrangler (YJ)

  • 1995 Jeep Wrangler (YJ)
  • 1994 Jeep Wrangler (YJ)
  • 1993 Jeep Wrangler (YJ)
  • 1992 Jeep Wrangler (YJ)
  • 1991 Jeep Wrangler (YJ)
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