Simpson has been manufacturing racing harnesses for over 60 years. Since the sale of harness set #1, over 100,000 auto racing harnesses have been sold. The usage of a Simpson racing harness varies from Quarter Midgets (QMA) to the closed roads of France in June for the legendary 24 Hours of Le Mans. Simpson racing harnesses can be constructed to make the most difficult fitment a simple bolt-in or snap-in installation. Trust Simpson racing harnesses to keep you safe on track, no matter what country or vehicle you are in.