American Racer Front 20.0” / 6.0” 13S 133 Compound
American Racer Rear 22.5 / 7.5 13S 133 Compound.
These are the spec tires used by the FRCCA for their Spec formula classes.
The tires have been available for many years. They seem to equalize outboard vs. inboard suspensions so "newer" cars don't have an instant advantage. The compound lasts most of the season (and they run 10-12 races per year).
I believe American Racer is the brand name for the old McCreary Tire Co.
Perhaps AJ or Andy could chime in with added information.