*** IN STOCK SHIPS TODAY *** RBS stocks heat treated steel rotor gear washers. These have the industry standard .500" bolt hole. Washers are designed to be used with roots blowers between 4-71 to 16-71 and will help provide proper bolt torque that stock GM washers can't provide.
Washer dimensions are 1.225" O.D., .230" thick with a .515" I.D. hole.
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