Chrysler 8-1/4 Inch, Racing Parts

Estimate horsepower, trap speed, and ET with our drag performance calculator. Use it as a 1/4 mile time estimator or 1/8 mile ET to mph calculator.

Concerned about a transmission swap? Our engine transmission compatibility checker will help confirm what you need to make it happen.

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

In this Tech Tip, John responds to a customer looking to upgrade the 8” stock differential in his Cougar to a 9” open diff.

In honor of NASCAR's 75th anniversary, we're taking a look at a few remarkable engines that have powered our favorite racers to victory through the years.

The Speedway Motors Tech Team created a quick how-to on squaring the front axle of your open wheel race car.

Speedway Motors Custom Length Driveshaft Kits make it easy to have a custom made driveshaft that's perfect for your application delivered right to your door!

The '21 season marks the 70th year of NHRA drag racing. Here's look at a few great drag cars from that 70 year history from the Museum of American Speed.

An engine guide that will help determine if an internal or external balanced flexplate is needed for your engine.

Little is thought of your engine’s starter until it refuses to turn your engine over at the worst possible moment. Today’s powerful mini starters can crank the biggest engines with ease. Learn how in our buyer’s guide.