TKR6732 - Shock Pistons (CNC, 2x1.8, flat/flat, 13mm, 2pcs) is not included with any kit. This can be used with the EB410, EB410.2, ET410 and SCT410SL vehicles and should be a direct replacement for the stock part or used as a new feature. Please use the instruction manual for the kit(s) listed to verify compatibility and no additional items are necessary before purchasing.