Howell EFI LT1/LT4 and EcoTec3 Harnesses for Classic Cars - Engine Builder Magazine

Howell EFI LT1/LT4 and EcoTec3 Harnesses for Classic Cars

Howell EFI harnesses are designed to transplant powerful engines into an unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sand Rails, Street Machines, and more.

Howell EFI now offers plug and play LT1/LT4 and EcoTec3 wiring harnesses for classic muscle cars, Corvettes and trucks. Howell now offers multiple options to transplant power for both automatic and manual transmissions and even supercharged classics. 

The LT1/LT4, and EcoTec3 wiring harnesses are customized to the customer’s specifications and include fuse block, check engine light, GM diagnostic connector, and electric fan control in a complete street rod type, stand-alone design to control engine functions. There is only one ground for the entire system and only three points of power to hook up the harness – battery, ignition and fuel pump. They are available with or without wiring for electronic transmission and all emission connectors are included  to ensure this harness is street legal in all 50 states as a replacement harness. All Howell EFI harnesses are OE quality, American-made, and backed with a lifetime guarantee and Howell’s experienced technical support staff. GM ECM programming or custom GM ECM tuning are available specific to your engine and transmission combination.

“We see a lot of online conversion kits that claim to be a one size fit all solution for folks converting their cars to electronic fuel injection,” said Matt Howell, president of Howell EFI.  “But the fact is that these are very complex systems that need special attention to the layout of the wiring harness and the right matching components. We spend a considerable amount of time during the order process to make certain every kit is what you need for true plug and play.”

Howell EFI harnesses are designed to transplant powerful engines into an unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sand Rails, Street Machines, and more.

For more information about Howell EFI LT1 wiring harnesses, view this video. For more information about Howell EFI, visit www.howellefi.com, or call (810) 765-5100. To review or download the LT-1 Fuel Injection Harness installation manual, visit here.

You May Also Like

UEM’s Speed of Air Hyperformance Piston and Ring Kit

Make your Cummins, Duramax, or Powerstroke diesel even more powerful and fuel efficient with fewer emissions with a United Engine and Machine Speed of Air Hyperformance Piston and Ring Kit. The pistons feature patented technology from Speed of Air Engine Technologies, a company that helps make internal combustion engines. The Hyperformance piston crowns have machined

Make your Cummins, Duramax, or Powerstroke diesel even more powerful and fuel efficient with fewer emissions with a United Engine and Machine Speed of Air Hyperformance Piston and Ring Kit. The pistons feature patented technology from Speed of Air Engine Technologies, a company that helps make internal combustion engines.

Manley “Extreme Duty” Inconel Exhaust Valves

Manley’s Extreme Duty valves are manufactured from unique XH-432 XtremeAlloy, which has been the mainstay of drag racing’s top pros for decades.

Gator Fasteners from Summit Racing Equipment

Keep things together in your Cummins, Duramax, or Powerstroke diesel with Gator Fasteners head studs, main cap studs, and rod bolts. Made from 8740 chromoly steel, the fasteners are heat-treated before the threads are rolled. That provides optimum fatigue strength. The fasteners are also centerless ground for dimensional accuracy and a secure fit. Related Articles

Walker Products’ High Performance Catalog

Walker Products’ latest High-Performance Catalog features high performance engine management and fuel components.

Silver Seal Deluxe Valve Stem Height Gauge Set

Silver Seal’s Deluxe Valve Stem Height Gauge Set (Part #KK975DX) comes with five interchangeable billet aluminum measuring bodies. Each body is presentable for reference use. Related Articles – Carrillo Forged Pistons and Connecting Rods for Ford 7.3L Godzilla – Fluidampr Harmonic Damper from Summit Racing Equipment – Elgin OE Replacement MLS Head Gaskets for Ford 6.7L Diesel

Other Posts

Starrett Introduces Easy-to-Use Precision Wireless Electronic Depth Gages

The L.S. Starrett Company, a leading global manufacturer of precision measuring tools and gages, metrology systems and more, has introduced three Wireless Electronic Depth Gages including the W640JZ, W643JZ, and W644JZ which are made in the U.S.A., part of a line of over 40 new electronic precision gages that Starrett recently introduced to the market.

PBM Rotating Assemblies

PBM rotating assemblies have a proven reputation of quality, durability and performance.

Turbosmart TS-1 Externally Wastegated Turbocharger

The TS-1 series are oil-cooled turbochargers with lightweight stainless steel cast turbine housings and a proprietary bearing and main shaft combination.

FuelTech FT600 EFI System

FuelTech’s FT600 EFI System is the perfect association between the ECU and the dashboard, making it a complete solution combining both features.