IF YOU ALREADY HAVE A POWER COMMANDER 5 AND WANT TO HAVE THE TOTAL FUN OF A QUICKSHIFTER THE QEM IS THE WAY TO GO. THE BLADE HAS DUAL INJECTORS SO TO USE A QUICKSHIFTER PROPERLY YOU NEED EITHER A QEM (QUICKSHIFTER EXPANSION MODULE), AN SFM (SECONDARY FUEL MODULE) OR AN IGNITION MODULE. THE QEM IS THE CHEAPET OPTION AND QEM ARE AROUND 3120 NEW. SFM IS £249 AND IGNITION MODULE IS NEARLY £300. ALSO YOU WILL NEED A PUSH SHIFTER UNIT AND A ROD A. I HAVE A REALLY CLEAN LESS THAN 1 YEAR OLD QEM WITH A PUSH SHIFTER AND ROD A. £195 (OVNO) + POST FOR THE LOT.