APR Sport Compact Engine Parts

Dirt modified racing delivers high-horsepower, adrenaline-fueled action, learn more about them and their racing classes

Inside GM’s Gen V LT engine family: history, tech, and performance of each LT engine option available.

What is the best engine to swap? Discover the top engine swap options, including LS, Hemi, and Cummins, and find the best engine swap for your build.

Prepare your classic muscle car for autocross competition by exploring the best options, beginner tips, and essential suspension upgrades.

Devyn Peterson is an Auto Tech in the Speedway Motors Customer Experience center. He's also a racer, starting out in karts when he was just 5 years old. He moved up to a Modified when he was 13 and hasn't looked back!

Explore dirt stock car racing’s key terms, classes, rules, parts, and tips for success in this ultimate guide for new competitors.

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.

What is the difference between 305, 360, and 410 sprint cars? From engines and horsepower to speed, cost, and racing series, both winged and wingless – we the racing experts from Speedway Motors break it down.

Learn what goes into setting the fuel for your engine and how to change the density altitude, ADR, main pill and high speed pressure to optimize a/f ratio.

Take a look at a few of the rare and wonderful Chevy engines in the Museum of American Speed!