LAND ROVER DISCOVERY / RANGE ROVER SPORT 3.0 TDV6 PISTON RING SET. Here we have an engine set (6) of new +020′ or 0.5mm size piston rings for the 3.0 tdV6 engine as fitted to Land Rover Discovery 4 , Range Rover Sport from 2010 onwards. These are oversize by 0.5mm. We also do standard size. Jaguar also used this engine… These are not available at Land Rover.. Part number – TDV6RING3.0020. RING CONFIGURATION – 2mm-2mm-2mm. Manufacturers part number used for reference purposes only.