This is 4 3d printed resin spoilers which can be used on a 1/64 nascar diecast which represents the spoilers used in the nascar cup series in 2010, made by Avanti designs. There was never a proper mold made by action of a 2010 nascar cup series car that featured that splitter and spoiler configuration. In order to use this, you will need to remove the wing on a 1/64 nascar diecast from 2007-2010.