Use this adapter if your wiring harness fits EV1 (Standard Bosch-type) fuel injectors with the rectangle connector and your new injectors are Denso or Bosch injectors with the Sumitomo connector - an oval connector with side-guides and a notch-and-lock on the top and bottom. Fits: Polaris RANGER 500 2X4 2006-2009 RANGER 500 4x4 2006-2011 2013 SPORTSMAN 500 EFI 2006-2013