Chrysler 8-1/4 Inch Modern Muscle Engine Parts

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

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.

I'm sorry to have to tell you this, but the '64 GTO was not the first muscle car.

Fuel injection is here to stay and we delve into the benefits of such retrofit systems for your classic muscle car or street rod in our EFI retrofit buyer's guide!

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

Who gets your pick as the best manufacturer from the golden age of the muscle car wars?

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

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.