Parts list: № Number Qty Name Options 1 RE546396 1 Engine Controller 1 RE561634 1 Software Software Available Through John Deere Custom Performance Website, SUB FOR RE552829 2 19M7897 4 Screw M8 X 35 Next page: ST874214 Engine Control Unit, ECU (305415 - ) PICT-0575.1 0575 Automatic Control Circuits