Holley Mechanical Fuel Injection

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!

Learn how to best choose between an electric or mechanical fuel pump for your project vehicle. We help you you understand the differences in order to properly design a performance fuel system with our buyer's guide.

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.

A detailed explanation of how Speedway Motors small block fuel pump works and a guide for how to replace and install the mounting gasket.

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

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

Learn how to install a bypass and deadhead style fuel pressure regulator. We cover how these regulators work with a carburetor and advantages of each style.

Thinking about a carbureted LS? Learn how LS carb conversions work, what parts you'll need, and how carb vs. EFI compares for power and drivability.