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

5.3 LS Build Combinations: Recipes for 400-700+ HP

Fuel injection is here to stay and we delve into the benefits of such retrofit systems for your classic muscle car or street rod in our EFI retrofit buyer's guide!

Choosing an Electronic Fuel Injection Retrofit for Your Street Rod or Muscle Car

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.

LS Swap Chevelle Guide

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

Holley Transmission Wiring Harnesses

Holley Transmission Wiring Harnesses | Speedway Motors

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Holley 558-405 GM 4L60/80E Transmission Harness

Holley Transmission Wiring Harnesses

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Holley 558-405 GM 4L60/80E Transmission Harness

Holley 558-473 Chrysler 46RE Trans Control Harness, Term X Max