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Howell Engine Developments, Inc. :: GM LT1 Products

Plug into the power of the LT1 V8, standard equipment in 1992-97 Corvettes and GM F-bodies and one of the most popular engines to drop in a Street Rod or Muscle Car. These engines came factory equipped with an advanced Sequential, Tuned Port fuel Injection system, and new cylinder heads, giving them a conservative 30% power advantage over their small block predecessors.
With this gem is under the hood you’re ready to get wired up and ready to rumble, and there is no easier way than with Howell’s LT1 TPI harnesses and accessories.
Howell’s EFI harnesses are hand built using GM/Packard high temperature wire and Packard Weatherpack connectors. Just connect the clearly marked weatherproof connectors where indicated, install four bare wires, and you’ll be ready to hit the street. It’s that easy.
Our LT1 harnesses have injector branches that run down each side of the intake manifold for a factory clean look. They’re available in several lengths and layouts for different stock replacement and retrofit applications and use a re-programmed ECM with full GM diagnostic capabilities.
Howell also has all the LT1 support accessories you need including MAF, MAP and knock sensors, fuel pumps, air filters and service manuals. Backed by over 20 years of experience Howell is there to help you with all your EFI needs.
When ordering, please specify emission, fan, AC and VSS requirements for your project and we will create the LT1 harness that is right for you.
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