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

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.

6.0 LS Build Combinations: Recipes for 500-1,000 HP

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

Speedway Economy 12 Circuit Wiring Harness

Building GM’s LQ4 6.0L Gen 3 LS engine for various power levels is easy with the right performance parts recipe.

LQ4 Engine Build Upgrades | Recipes for 500HP - 1,000HP

LS swaps are nothing new, but they're still a little mysterious to some of us. Here is an overview of what you will need and what you need to know to swap some modern performance into your muscle car, truck, or hot rod!

LS Swap How-To Guide

Watch our Steering Column Wiring Guide video for useful tips on wiring your new steering column for your vehicle. Ididit takes you through the wiring process.

Steering Column Wiring Guide

Looking to swap the venerable LS engine into your hot rod, muscle car, or classic truck? Take a look at our detailed identification guide for Gen III/IV LS engines before you hit the salvage yard or swap meet!

Gen III/IV LS Engine ID Guide

Follow this step by step guide on how to install adjustable LS motor mounts to set your engine location exactly where you want it.

A Guide to Installing Adjustable LS Motor Mounts

There are several types of quarter-turn fasteners used in the performance automotive aftermarket and in this buyer's guide we'll help show you the correct fastener for your application and how some of the most common types of fasteners are used.

Selecting Quarter-Turn Fasteners

Whether you’re looking for performance improvements or heat reduction, if you decide to wrap your headers, we'll show you the benefits and possible precautions to take before you wrap your exhaust.

Exhaust System Header Wrapping

Engine Family Facets

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4L65E, Engine Wiring Harnesses

4L65E, Engine Wiring Harnesses | Speedway Motors

Shop 4L65E, Engine Wiring Harnesses and get Free Shipping on orders over $175 at Speedway Motors, the Racing and Rodding Specialists. 4L65E, Engine Wiring Harnesses in-stock with same-day shipping.

4L65E, Engine Wiring Harnesses

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

Painless Wiring 60520 Throttle by Wire EFI Harness, 05-06 GM LS2

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