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

How to Wire a Race Car | DIY Wiring Harness 101

This resource contains a transmission pan shape ID chart and other tips to help with identifying GM transmissions.

How to Identify GM Transmissions | 700R4, TH350, 4L60, TH400, 4L80e, Powerglide, & More

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

Speedway Economy 12 Circuit Wiring Harness

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

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!

How to Choose a Racing Harness

Unbox our most popular wiring harness with Tim.

Speedway Tech Talk - Unboxing Wiring Harness Kits

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

New Racing Safety Products from Speedway Motors: Harnesses

Electrical wiring is one of those tasks that enthusiasts dread tackling on their own. We're here to tell you that wiring your project vehicle is something you can do with a little help from your friends at Speedway Motors!

The Best Wiring Solution for Your Hot Rod or Muscle Car Project

Discover the best wheels for drag racing; the lightest options, beadlocks, and SFI certified wheels and learn how beadlock wheels work

Best Wheels for Drag Racing | Lightest Drag Wheels & Beadlocks

Follow along as Jeff installs an early 700R4 transmission for the big block in his 1967 Chevelle. See how this unit is upgraded and converted to a later 30 spline style.

Upgrading a 700R4 Transmission - 1967 Chevelle

Engine Family Facets

707063f6-5cf0-44d1-8e1f-49059e48addf

3fe4cfeb-d42e-4b60-a312-2940d324f962

4L70E Drag Racing Engine Wiring Harnesses

4L70E Drag Racing Engine Wiring Harnesses | Speedway Motors

Shop 4L70E Drag Racing Engine Wiring Harnesses and get Free Shipping on orders over $175 at Speedway Motors.

4L70E Drag Racing Engine Wiring Harnesses

Brand

Price

Products

PSI Conversion HAR-4L80-1 Adaptor, 13 Pin 4L60-75E to 4L80E