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Home - Howell EFI Conversion & Wiring Harness Experts
Howell Engine Developments, Inc. was formed in 1988 by Bill and Matt Howell to support the growing trend towards the use of electronic fuel injection in the Hot Rod/Street Rod and Four Wheel Drive Industries. At Howell EFI, we do not make a one size fits all product line. GM Tuned Port, Multiport, Central Port & Early LT1 Wiring HarnessesJeep · Ford · GM TPI Products · GM TBI Products · General Motors · GM Vortec Products
Installation Manuals - Howell EFI Conversion & Wiring
Installation Manuals. Tuned Port Or LT1 Fuel Injection Harness; Tuned Port Fuel Injection Kit & 199296 LT1 Engines; Vortec/LS1. Vortec Truck V8/V6 Fuel Injection Harness; LS-1 & Gen III (Vortec) Truck EFI Wiring Harnesses Howell Engine Developments,
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