Simpson Racing SA2020 Diamondback Racing Helmet7.5 - Black Late Model 75 in Wheel Bolt Pattern

75 in Wheel Bolt Pattern - 24 Spline - 3/4 in Bolt-On Cap / Hardware / O-Ring - 2-1/2 in Grand National Hubs - Each

600 in Head - 11/32 in Valve Stem - Stainless - Edelbrock Performer 5

Counter Shaft - Reverse - Steel - Winters Falcon Transmission - Each

providing enough components for multiple installations or replacements

RPM Module Chip - 9000-9800 RPM - 200 RPM Increments - Even - Kit

Simpson Racing SA2020 Diamondback Racing Helmet7.5 - Black Late Model 75 in Wheel Bolt PatternA major revision to our Simpson Diamondback for 2021 combines a new Italian composite shell with a shorter chinbar and changes to the visor mounting for improved fit and function while also providing enhanced impact protection. Helmet ships with one clear face shield installed, additional face shields may be purchased separately.