Another option for the 6 litre engine owners. If you have a 6 litre LS2 equipped VZ-VE Commodore you have another option in relation to an engine upgrade. Fitting one of our Premium 420ci Stroker kits comrpising our forged 4340 steel 4.100" stroke cranks, custom Diamond Racing forged pistons and our billet 4340 steel "H" beam rods brings your 6 litre engine all the way up to 420ci or just under 7 litres. The stock LS2 big square port heads, intake and injectors will do the breathing work very well.