Porsche 911 997 (2005-2013) 997 GT2, GT3 & GT3RS (2006-2013) Front Track Control Arm Caster Offset Outer Bush - PFF57-502GBLK PFF57-502GBLK uses a Black 95A 80A durometer bush and an offset bore sleeve to allow up to 0.4deg of caster increase from OE. This allows for steering pull correction or a more aggressive steering axis angle for increased steering feel and in-corner camber gain. It fits the front of all 996 and Boxster 986 models, and the front of the 997 GT2, GT3 & GT3RS models only. All other 997 models use PFF57-802GBLK. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!