Mercury Custom Ignition Wiring Harnesses

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.

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

Mick Rau has a garage full of cool cars, but this Hirohata-inspired Merc is a standout.

Learn about the wiring of GM HEI Ignition Distributors with our diagrams and guide. Ensure you are getting the best performance out of your ignition system.

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

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

Instructions on how to install a PerTronix Ignitor Kit in an old flathead distributor for a flathead V8.

Do you have a collection of decals? Here's a step-by-step process of how to turn them into reuseable magnets! This is a DIY project that takes minimal time.

Learn how to keep your starter cool using a heat shield. Read the steps and parts necessary for the installation.