Howell TBI KIT 1987-90 YJ 42L Offroad - YJ258 |

Howell TBI KIT 1987-90 YJ 42L Offroad - YJ258

universal fit logo


  • Howell | Part Number: HOWYJ258
  • Injection Type:Throttle Body
  • Fitment:Universal Fit
  • Kit Type:Stock Replacement


Fuel injection has many benefits that are advantageous for the Off-Road enthusiast two of which are increased reliability and efficiency. These kits contain all the parts necessary to convert your carbureted Jeep over to fuel injection, helping to keep you out on the trail for years to come.

Customer Reviews

4.0 4.0
1 Customer ratings
4.0 this is a great product

easy to install readlly available replacement parts

from wasilla alaska |

Question & Answers

3 Answered questions

Q: I have a 91 wrangler and I am not concerned about California emissions. Which kit should I get and I am a diesel mechanic, How long should it take to install? Weekend project or longer. Answer this question

A: Hello EZ There is a street legal CA approved kit part number HOW CA/YJ25887-91 It is simple install about 6 to 7 hours max. Thanks

Answered by Rody on 07/15/2015

Q: I have an International Scout 2. it is a 1079 with a 5.6 V8 I would like to convert it to fuel injected do you have a kit. Frankie Minter Answer this question

A: hello I would look at kit HOW K247JPV8CA304 which can be set up when ordered for the 345 motor.

Answered by Rody on 01/08/2015

Q: Is this conversion CARB certified Answer this question

A: This part number Howell Fuel injection kit is not CARB legal, you will need part number HOWCA/YJ25887-91 for the CARB legal kit.

Answered by DP on 07/15/2013


Howell Engine Developments, Inc. was formed in 1988 by two brothers who wanted to turn their passion for classic cars into their career. The company focuses on producing fuel injection systems to upgrade classic Jeeps that were made in model years before on-board computers were standard. Howell Engine Developments produces wiring harnesses that don't require Jeep owners to be electricians or computer programmers to successfully install in their classic Jeeps. Classic Jeeps can now access the increased fuel economy and heightened performance of an ECM controlled fuel injection system without the Jeep owner accessing headaches while installing the upgrade. Shop Howell Now