Contact Us

Shop Hours & Appointments

To better serve the racing community and accommodate the busy schedules of drivers and teams, GRI does not hold regular storefront business hours. We are happy to meet you at the shop at a time that is convenient for you. Please text Greg at 605.351.7831 to set up an appointment. We can accommodate most any timeframe with advance notice.

The best way to reach Greg directly for parts inquiries or technical questions is via text.

• Shop Manager: Greg Gunderson

• Phone (Text ONLY): 605.351.7831

• Location: 608 Augustana Avenue #110, Harrisburg, SD 57032 (Just a few miles south of Sioux Falls)