Howell Archives - Engine Builder Magazine
Howell EFI Wiring Harnesses

Reprogramming of the existing ECM or ECM module supplied by Howell is required. ECM’s are reprogrammed to the vehicle’s engine and transmission specifications; i.e. gear ratios, tire size, cam changes, vehicle anti-theft (VAT’s) removal, etc. 

Howell TBI Conversion Kits for 1974-1993 Dodge Ramcharger and Plymouth Trailduster SUV

Howell EFI now offers TBI kits to convert any first or second Generation Dodge Ramcharger or Plymouth Trailduster to throttle body injection for improved drivability, cold starting and fuel mileage in one plug and play system. Howell’s Chrysler TBI systems improve starting and idling with a more consistent tune that equates to improved fuel mileage and drivability. 

Howell Conversion
Howell EFI I-6 and V8 Ford TBI Conversion Kits

Howell EFI is known widely in the industry for their easy to install GM-based EFI and TBI kits for Jeep CJs, most of which are 50 state emissions legal. Now available are Howell’s Ford Inline 6 and V8 TBI Kits ideal for converting carbureted first generation classic (1966 to ’77) Ford Broncos to TBI. Whether

Conversion Kit
Howell Truck Wiring Harnesses for 2014+ EcoTec3 4.3L V6 Engine

Each harness allows for a transplant of an EcoTec3 4.3L engine into an unlimited number of applications from Street Rod, Pro-touring, Off-Road, Sandrails, Boats and more.

Howell EFI Throttle Body Injection Kit

The new Throttle Body Imjection conversion kit, designed to provide almost universal coverage, features a remanufactured GM throttle body appropriate for the engine size and is designed to operate for engines with, or without, ECM controlled ignition. The kit includes the ECM, fuel pump and all sensors, components and wiring harnesses.