Genuine NOS AE Hepolite Piston Assembly

Standard size 82mm and 4.9:1 Compression

Complete with rings, gudgeon pin & Circlips

Please note, this is a Genuine Hepolite piston, NOT the New Hepolite brand which are made in Taiwan.

Not all pistons are complete with box

Suitable for BSA M20 1937-1955

Part numbers 66-1193 & Hepolite ref 11957/STD