PLEASE NOTE: Delays in processing orders. Orders placed between Tuesday 21 January and Monday 10 February will be processed 11 February.
Valve cups (bottom seat) for Inlet and exhaust valve, for Norton singles (each). 2 required per engine. Suits Norton 500 OHV single 1931 to c1958. match to A3/147 Original part numbers: 3079; A3/148; H3/148; 16133 - valve spring cup bottom