Simpson Racing SD1 Helmet - M - White 1971-gmc-c15-c1500-suburban-esi2757891 020 in Compression Thickness -

020 in Compression Thickness - Steel - Ford FE-Series - Each

Intake Manifold - Buick B-4B - Square Bore - Dual Plane - Aluminum - Natural - Big Block Buick - Each

Battery Disconnect - Rotary Switch - Panel Mount - 250 Amps - 12V - Alternator Posts - Aluminum On / Off Panel - Black - Each

Motor Oil - Racing Oil - High Zinc - 10W30 - Synthetic - 1 qt Bottle - Each

39 - Steel - Each

Simpson Racing SD1 Helmet - M - White 1971-gmc-c15-c1500-suburban-esi2757891 020 in Compression Thickness -Simpson'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. NOTE: This helmet is Snell SA2020 certified and is broadly accepted by race organizing bodies and tracks through 2030. Always verify safety rules with your sanctioning body. The Snell Foundation recommends replacement after five (5) years from the