PLEASE NOTE: Delays in processing. Orders placed between Thursday 11 April and Wednesday 1 May will be processed 02 May.
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