Sold individually. Complete replacement dampers for MAX coilovers are a more thorough and cost effective alternative to rebuilding your old shocks. Allows rebound control of 4-50kg springs with the turn of a knob. Click the dropdown menu to select diameter & length of chrome shaft, & m52p1.5 black threaded body after measuring your existing damper for replacement. Macpherson strut front applications use 20mm diamater shafts. Rear coilovers as well as front double wishbone applications use 14mm shafts. Not compatible with other brand coilovers or our older M52p2.0 threaded lower mounts and spring collars. See the shock dyno graph in the gallery to view our very linear and responsive adjustments as well as how to measure. M12p1.25 top thread. *Racing use only. ~ High range adjustment happens over 4x360* turns or 32 clicks. ~ Stay on effective adjuster knob range for your spring. ~ Very light springs can use full soft through click 6. ~ Conventional 6-8kg rear spring click setting is 6-12. ~ Commonly used front 10-18kg spring uses click 12-18. ~ High rate 22-32kg springs will use click 18-24. ~ Settings 25-32 are only used with 30-50kg springs. ~ Never preload springs, they should easily turn by hand. ~ Coilover lower mount thread is used to set ride height, unless you are utilizing helper springs.