Gunderson Racing Inc. is located in Harrisburg, SD, just a few miles south of Sioux Falls. Greg Gunderson has been selling new and used sprint car parts for 13 years and has 30 years of racing under his belt. These experiences lead to great knowledge of the business and success in working with customers. Used parts inventory changes daily. If you don’t find what you are looking for on this website, please feel free to contact Greg. Although the shop does not hold regular business hours, you can text Greg at 605.351.7831 to set up an appointment to meet at anytime. Thank you for checking with GRI. Best of Luck in your racing season!