Holley Racing Engine Wiring Harnesses

Wiring of your race car or hot rod can be completed at home with these helpful automotive 12 V wiring tips.

Making great horsepower on a budget is the LS engine family’s claim to fame, but just like any other engine, the more power you ask of it the more you’ll need to spend.

Read how to wire a lightning sprint engine. This detailed account of how to successfully wire an engine will ensure a smooth installation.

In this Tech Tip, John answers a customer question about the Speedway 12 Circuit Wiring Harness.

Speedway Motors just added some exciting new options to our line of racing harnesses.

Learn about performing an LS Swap in a 1972 Chevelle in this tech article. We'll discuss lessons learned from our Chevelle engine swap using a 500-horse 6.0.

A guide on how to install a universal wiring harness in a car. Read tips on properly wiring taillights, headlights, gauges, ignition switch, steering column and more.

Unbox our most popular wiring harness with Tim.

Having a difficult time deciding which racing harness to use? With many options to consider from size to closure type, this article will walk you through how to go about choosing the perfect one for you and your race car. Safety first!

Need a little help figuring out which race harness will suit you best? Click here for some things to keep in mind!