Simpson Racing SD1 Helmet - M - BLUEMedium - Blue - SA2020 Modified visors should NOT be cleaned

visors should NOT be cleaned with water-based products

Air or Brake Duct - Bumper Mount - Driver / Passenger Side - Single 3 in Tube - 13

Suspension Tube - 7/8 in OD - 7-1/2 in Long - 5/8-18 in Female Thread - Steel - Black Oxide - Each

Axle Clamp - Aluminum - Black Anodized - 2-3/8 in Butler Built Axle Tether - Pair

It allows for organized and precise adjustments

Simpson Racing SD1 Helmet - M - BLUEMedium - Blue - SA2020 Modified visors should NOT be cleanedSimpson's, lightest and most aerodynamic helmet, the SD1 is a premium helmet at a reasonable price. The helmet is tailored towards open wheel dirt track racing with no front vents and a front chin spoiler.