Chrysler 8-1/4 Inch, Engine Parts

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

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

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.

Wondering what a stroker motor is and how to build one? Speedway Motors has the answers with this stroker motor build guide.

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

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

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!

Learn how to hook up a 1-wire alternator on your vehicle. 1-wire alternators are perfect for engine swaps or just keeping things simple for your project.