Zinoro M12 (2013 - 2015) Rear Upper Shock Mounting Bush 10mm 10mm - PFR5-416 For standard shock absorbers and performance shock absorber with a 10mm thread use PFR5-416. PFR5-416-12 fits performance shock absorber which has 12mm thread. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!