LAND ROVER DISCOVERY 4 / RANGE ROVER SPORT 3.0 TDV6 PISTON RING SET. Here we have an engine set (6) of new standard size piston rings for the 3.0 tdV6 engine as fitted. To Land Rover Discovery 4 , Range Rover Sport from 2010 onwards. Jaguar also used this engine… These are not available at Land Rover.. Part number – TDV6RING3.0. RING CONFIGURATION – 2mm-2mm-2mm. Manufacturers part number used for reference purposes only.