Performance Tuners

Understand GM’s AFM system—how it operates, it’s pros and cons, common lifter failures, and your options for tuning, disabling, or full AFM delete.

Pat shows off how easy wiring your LS can be with our LS wiring kit.

Are LS injectors confusing you? Comparing stock vs aftermarket vs decapped, we help you choose the right LS Fuel Injector Size & Connector!

Learn how to upgrade your stock Chevy 350 or Ford 302 for peak performance with bent exhaust systems and more. Don't settle for stock in your crate engine.

A quick review of the Performance Tool W41036 Deluxe Engine Leveler available at Speedway Motors.

Build a high-performance Gen V LT engine with proven power combos and learn about LT upgrades and tuning tips for maximum power

One of the most important parts of your racing operation is the engine. This article gives a detailed overview on how to maintain your engine to get the most out of it for as long as possible. Also learn some tips to prolong the life of your engine.

We look at the basics of performance carburetion and what you need to properly supply your street or race car with enough fuel in this buyer's guide

Unleash power, save money with Speedway Motors. Turbo setups for your 4.8, 5.3, or 6.0 LS engine offer unmatched dollar-to-horsepower value. Get it right the first time with us!

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!