Note to buyers with sliders welded to your frame. A customer had to add a washer to each side of the driver seat. We were baffled. Finally figured out the welded slider on the driver side affected the threaded holes. Had no issue on the passenger side. This is the only issue found in over 30 pair sold. So if you have welded sliders, and you add spacers under the seat to floor brackets, you may need to pick up a pair of washers for the 10 mm bolts. This is info for any brand or style of seat spacers that you buy.