| Also known as | JRC 12-804D |
| Listed in parts books | Not catalogued by year yet |
TOP SET,ALLOY 500 49-56
Top piston ring set for the 500cc alloy engine, catalog-listed for 1949-56.
This is a top set of piston rings sized for the 500 alloy engine, catalog-dated to the 1949-56 span. "Top set" in the ring trade generally means the compression rings for the top of the piston, not the full ring pack including the oil scraper - the catalog listing here just says "top set" without spelling out the count, so take that as the description rather than something Ed's adding on.
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The part carries a couple of alternate numbers in our records, JRC-12-804D and D804TRI, which look to be different ways the same ring set has been catalogued over the years. Beyond the years and displacement given, we don't have more detail on file for this one - no bore size, no material spec beyond "alloy" describing the engine it's meant for, not the ring itself.
Given how sparse the write-up is, call the shop and we'll confirm which engine and bore this actually fits before you order.
Sorry if we got something wrong here. If you think this information isn't correct, .