PISTON FULL KIT VR38 4.3L21004 AN019 Capacity Upgrade Kit VR38DETT 4. 3L HKS has redesigned VR38DETT 4. 1L Kit to upgrade it to 4. 3L Kit. This kit is available from street use to circuit use. The following is the main redesigned features: 1) Higher Torque Allowable Torque: 150kgm 2) Low Vibration Equivalent Level to the Stock 3) Longer Stroke Stroke: 99mm (the world's longest level) Features Piston Kit The billet pistons have the ideal piston shape. The special truss shape