AJS, Matchless all models 1950-'64 alloy head
Ariel Square 4 MkII alloy head
BSA B32 alloy head
BSA C11G, C15, C15T
Norton 16H and Big Four with14mm plug hole
Norton ES2, 88, 7, 99 alloy head
Norton 19R, 19S, 50, 77, 500T
Triumph 3TA dDutch army low compression
Triumph T120, TR6, T140, TR7 electronic ignition
Velocette MAC alloy head
