AJS, Matchless 350/500 singles iron head
Ariel Square 4 Mk1 alloy head
Ariel OHV singles iron head
BSA A7/10 iron head
BSA B31/32/3334, M33 all iron head
BSA C12
Norton Model 18/30/40 iron head
Norton ES2, 88, 7 iron head
Triumph Terrier and Cub iron head
Triumph T100, T110 iron head
Triumph TRW500 SV
Triumph 3H
Velocette all iron heads
Ariel side valves, 14mm, short shaft
Triumph 3S
