PLEASE NOTE: Delays in processing orders. Orders placed between Thursday 22 January and Monday 09 February will be processed 10 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 A3/147Original part numbers:3079; A3/148; H3/148; 16133 - valve spring cup bottom