Plymouth Custom Engine Parts

Determining your engine's bore and stroke displacement, and more with our easy to use calculators

In our quest to make everything on our cars better, we're constantly trying to clean things up under the hood. One quick way to get there is by smoothing the firewall. Here are a few ways to get that custom engine bay.

Speedway Motors Museum of American Speed, dedicated to preserving, interpreting and displaying physical items significant in racing and automotive history, announced today new acquisitions and loans that are now on display in the new year.

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.

These days, muscle cars aren't just for straight line blasts down the dragstrip. Here's a primer on some of the trick hardware that's available to make your muscle car into a corner carving Pro Touring car that can do it all.

Knowing popular engine dimensions and weights are critical to a successful engine swap in your project vehicle

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

Follow along as Product Guru Jeff K. talks about customizing a Comet Pedal Car for his son!

Here's a handy guide to familiarize you with our G-Comp line of performance suspension systems.

The dyno at the Speedway Motors Racing Engine shop is always humming. We set up a camera in the cell to catch a few of the engines that have passed through the door recently.