Air and Fuel› Fuel Injection Systems and Components - Electronic
Howell EFI
4.2L Electronic Throttle Body Fuel Injection Kit
SKU: CA/JP258
Moderate — 2–4 hours
Description
This kit converts a 2-barrel carburetor setup to EFI using a remanufactured 4.3L Chevrolet throttle body. It requires a high-pressure fuel pump in the main fuel line with a bypass returning fuel to the tank. The harness includes a diagnostic connector with diagnostics similar to 1986-92 GM pickup trucks.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Howell EFI |
| Part Number | CA/JP258 |
| Category | Air and Fuel |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy