XSTSR and SUPRS Join Forces, Will Co-Sanction Online Sim Supermodified Races March 14, 2015 – Goshen, IN…Xtreme Short Track Sim Racing, (XSTSR), and the Supermodified Ultimate Pavement Racing Series, (SUPRS), two well-known online sim racing leagues, have announced that they will join forces for a partnership to include the co-sanctioning …
Real supermodified race winners from across the country:
10/15-ISMA; Thompson Speedway Motorsports Park ; World Series of Speedway Racing: Dave Shullick, Jr.
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