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Howell Engine Developments JP258 Fuel Injection Conversion for 81-86 Jeep CJ-5, CJ-7& CJ-8 with 258 6 Cylinder

Quadratec Part #: 17002.10D
Howell Engine Developments Part #: JP258
The Howell EFI kit converts 258 Jeep engines to Electronic Fuel Injection by adapting 4.3L GM V-6 components and in-line electric fuel pump. Throttle Body Injection adapts directly to Jeep 2 barrel carb inlet manifold. Most of the old emmission plumbing is eliminated making for a cleaner and easier to maintain engine. Improve your Jeep vehicles drivability and fuel economy while bringing life back into a tired motor by converting to fuel inection today!

CARB Notice

  • Legal in California, or other states adopting California emissions standards, only for racing vehicles that may never be used, registered or licensed for use, upon a highway. Can not be shipped to California residents.

This kit uses almost entirely GM parts and even includes a diagnostic port for easy trouble shooting at any GM facility. It does not get much easier than this.

Installation Notes
Installation Difficulty:
Level 4Experts Only

Welding required for 02 sensor bung.

Installation Time: 2-4 hours
Parts Included

Throttle Body
Inline fuel pump
Fuel line
Wiring Harness
Gaskets and washers
O2 sensor bung (weld in)
02 sensor
Temperature sensor
Adapter plate

90 Day Limited Warranty, Computer Warrantied for 6 months.
  • Engine Size: 4.2L 258ci I-6
  • Engine Fuel: Gasoline
  • Shipping Weight: 16lb
  • Jeep CJ-5

  • 1983 Jeep CJ-5
  • 1982 Jeep CJ-5
  • 1981 Jeep CJ-5
  • Jeep CJ-7

  • 1986 Jeep CJ-7
  • 1985 Jeep CJ-7
  • 1984 Jeep CJ-7
  • 1983 Jeep CJ-7
  • 1982 Jeep CJ-7
  • 1981 Jeep CJ-7
  • Jeep CJ-8

  • 1985 Jeep CJ-8
  • 1984 Jeep CJ-8
  • 1983 Jeep CJ-8
  • 1982 Jeep CJ-8
  • 1981 Jeep CJ-8
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