Piston ring sets of quality manufacture for use in all our Indian engines and genuine Lister engines when used with a standard Lister 5 ring cast iron piston, they will fit our Indian alloy piston for 8-1/16-2 or our cast iron piston for 5-1, 6-1,10-2, 12-2. If you have an old original 8-1 or 16-2 with an alloy piston please contact us first. The set comprises of four compression rings P/N 10-4-18 and one oil scraper ring P/N 23/22/99