CHAMPION SPARK PLUGS N5C x 2 copper plus BSA NORTON AJS ARIEL MATCHLESS Vincent

AJS- ALL MODELS WITH ALLOY HEADS 1950 ONWARDS. MATCHLESS - ALL MODELS WITH ALLOY HEAD 1950 ONWARDS. ARIEL- SQ4 MK 11 ALLOY HEAD. BSA- GOLDSTAR B32,B34,B40, ALLOY HEAD. NORTON - MODEL 16H 500cc S.V. PLUG FAILURE BRINGS YOU TO A STANDSTILL!