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Howell Engine Developments, Inc. :: GM TPI Products

Harness the power of electronic fuel injection with our complete wiring systems for 1986 to 1992 GM TPI engines. Putting one of these attractive and good running engines under the hood of your favorite G-body, muscle car, street rod, Jaguar, truck or boat provides great torque and lots of smiles, but without the proper wiring it can be down right intimidating.
Enter Howell’s application specific, attractive and easy to use TPI harnesses. These legendary harnesses feature GM/Packard high temperature wire and Packard Weatherpack connectors, each clearly labeled for ease of installation. Forget about miles of unmarked wire, shoddy connectors and complicated schematics. Just connect the weatherproof connectors where indicated for a great looking system you can be proud of with the hood up or down.
Our TPI harnesses have injector branches that run down each side of the intake manifold for a clean, professional look and include underhood mounting provisions for relays and the ECS module. Our street rod harnesses run down the middle of the engine, out of sight under the plenum.
Howell also has all the support accessories you need for MAF (1985-89) and Speed Density (1990-92) systems, including ignition control modules, sensors, fuel pumps, E-Proms, Mem-Cals and even air filters. Couple this with over 20 years of experience and you get the quality, knowledge and security that take the guess work out of TPI, and put you in the driver’s seat faster than you ever thought possible.
When ordering, please let us know what emission, fan, AC and VSS wiring is required for your specific application and we will create a handmade Howell TPI harness just for you!
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