BSA BSA M20 M21 Inlet Cam Follower
B31 B33 Inlet & Exhaust 66-1493
With the M20 and M21 this cam follower can be used as either inlet or exhaust.
Around 1940, 66-1495 was introduced for the M20, M21 exhaust.
New Old Stock but we have given them a bit of a clean up
BSA BSA M20 M21 Inlet Cam Follower B31 B33 Inlet & Exhaust 66-1493
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