These disc brake pin spindles are crucial to your entire front end. Starting in 1970 Ford upgraded the spindle found on the V8 Mustang to a much beefier unit. This helped to better stabilize the larger cars and provide a stronger component. Fortunately these later spindles are easily adapted to the earlier cars by upgrading to a set of 1969-1973 outer rods, spindle nuts and wheels bearing/races.
This provides a much stronger platform to build from, and is strongly recommended if you’ve made horsepower upgrades and are now looking to upgrade your brakes. Our Wilwood kits will mount directly on these, but you have to order the package for the 70-73 cars. Combined you’ll get a much stronger and more rigid design in a crucial area.
We prefer to use the disc brake spindle over the drum brake spindle. The disc brake allows the caliper to be mounted directly to the spindle, whereas the drum brake version requires an adapter.
We also strongly encourage the use of Pinto/Mustang II bearing spacers to help increase wheel spin and improve the longevity of your wheel bearings.
The MMI upgrade spindle kit includes a pair of 1970-1973 Mustang new forged disc spindles.