The XR Super Series returns to Volunteer Speedway April 5-6, supported by the ONUM Dirt Modifieds. FRIDAY, APRIL 5: XR Super Late Model Spring Thaw Warm-Up pays $12,000-to-win and $1,200-to-start, with ONUM Modified paying $2,000-to-win and $200-to-start. SATURDAY, APRIL...
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