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.

Universal Wiring Harness Instructions - Installation

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

Speedway Economy 12 Circuit Wiring Harness

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

How to Wire a Lightning Sprint Engine

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

New Racing Safety Products from Speedway Motors: Harnesses

Choosing the right suspension products when building your street rod or custom car. A step by step on how to determine which parts are needed for installation, how to calculate the spring rate and other helpful tips along the way.

Installing Torsion Bars in Street Rods

Engine Family Facets

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Plymouth Street Transmission Wiring Harnesses

Popular Parts and Makes

Plymouth Street ECM Wiring Harnesses

Plymouth Street ECM Wiring Harnesses | Speedway Motors

Shop Plymouth Street ECM Wiring Harnesses and get Free Shipping on orders over $175 at Speedway Motors.

Plymouth Street ECM Wiring Harnesses

Brand

Application

Price

Products

FAST 301404 Switching Outputs Wiring Harness, Push into Connector

FAST 301403 VSS and Auxiliary Shaft Wiring Harness

FAST 301400 Power Adder Wiring Harness, Nitrous and Turbo Applications

FiTech 38301-1 Ultra Ram EFI Throttle Body Adapter Harnesses

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