TH400, Chrysler 8-3/4 Inch, Racing Parts

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.

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

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

Tim shows off our aluminum cylinder heads for 348-409 Chevys.