BMW Z Series Z3 inc M (1994 - 2002) Front Lower Wishbone Rear Bush Caster Offset - PFF5-303 PFF5-303 has an eccentric offset bore, increasing caster by 6.5mm / 0.5deg, for better turn-in response and in-corner camber gain. For M3 (not Evo) or for non-M models. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!