PLEASE NOTE: Delays in processing orders. Orders placed between Tuesday 21 January and Monday 10 February will be processed 11 February.
Valve spring heat insulating washer for all Norton twins and matchless twins 1964+ (each). 4 required per engine with normal cams; only two on the exhaust with a 2S cam and none with a 4S cam BUT check your head first before excluding them.Originally fitted in 1953, if only two are fitted they go under the exhaust-valve cups. Original part numbers: H12/16339; 16339; 067845; 06-7845 - valve spring heat resisting washer
