Simpson Racing SD1 Helmet - M - BLUEMedium - Blue - SA2020 Modified which filters down to 40

which filters down to 40

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

2 in - GM 8-Bolt - Kit

Spindle - Stock Pin Height - Passenger Side - IMCA Approved - Forged Steel - Black Paint - Ford Mustang II - Each

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

Simpson Racing SD1 Helmet - M - BLUEMedium - Blue - SA2020 Modified which filters down to 40Simpson'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.