If the racer is running the PSI spline the seal and seal housing are removed from the bearing support housing and this seal replaces both parts.
Seal measures 3.155" O.D. x .320" thick x 2.430" I.D. where the hub rides.
Racer can look at the fifth and sixth picture and if this is what your crank hub looks like this is the seal for you. If the racer is running a RCD brand PSI spline center flange crank hub it will use the stock RCD #700-034 crank seal.