CNC Machined top cup plate, with distinctive ears, which retain the hairpin valve springs.
These valve spring retainers fit all top cup plates (sold seperately) and are milled from solid.
Unlike the originals (which were made from flimsy pressed steel and wear badly - with obvious consequences), these items are machined from solid EN24T and are extremely tough and hardwearing. However, these have proven very difficult to make with many machining operations and occasional broken tools (we hate doing them!), which is reflected in the fact they are not cheap - but they are nice. 15/12/12: Now back in stock, and we have managed to keep the price the same as before!