Alfa Romeo Spider 939 (2005-2010) Front Lower Arm Rear Bush 54mm - PFF1-502BLK Fits models from around 2007 on with 54mm wide bracket.et. PFF1-502-46 Fits early models up to around 2007 with a 46mm wide bracket.PFF1-502 Fits later model from around 2007 on with 54mm wide bracket. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!