APR Street Engine Parts

Learn how to choose the right valve springs for your camshaft, the differences between single and dual valve springs and when to replace them.

There is no shortage of awesome cars and engines at the 50th NSRA Street Rod Nationals. Check out some of our favorites so far!

This resource contains a transmission pan shape ID chart and other tips to help with identifying GM transmissions.

It may feel like a daunting task attempting to determine the best leaf spring for your traditional hot rod straight axle build, but our buyer's guide will surely help.

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.

Speedway Motors announced today a list of new products that will be debuted Aug. 5-8 at National Street Rod Association’s (NSRA) 52nd Annual Street Rod Nationals in Louisville, Ky.

Incorporating a Model A rear cross member and a high arc stock spring into a roadster build.

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

While everyone is looking for a 6.0 LS, don’t count out the original 5.7 LS1 engine for your next LS swap performance build

If your replacing, or purchasing a new spring for a solid front axle, it's important to know where to measure from to ensure you get the right spring for your rod.