New for 2021 - Ultra High Range Adjustable Damper for springs up to 50KG without teardown, rebuild, and dyno tune. Pro coilover key features: Our Pro coilovers for JZZ30 SC300/400 and MK4 Supra are specially tuned for drifting and high performance driving. Spring rates are 22kg/mm in the front, 12kg/mm in the rear standard. Great tune for this vehicle's double wishbone suspension design. Dampers are tuned to work well even at low ride heights without sacrificing handling, grip, & performance. 1) Low ride height ability 2) Fully threaded damper & lower mount allows vehicle height to be adjusted independent of the spring preload. Without using a helper spring, we recommend Zero spring preload. 3) Large range of rebound adjustment is available at the turn of a knob on the top of each damper 4) 32 click UHRAD damper adjusters allow a huge range of rebound adjustment. 5) Replaceable Damper 6) Variety of spring rates available by request, including helper springs. 7) Low torque maintenance free spherical bearing upper mount on front AND REAR allows you to use extended control arms wihout binding the coilovers. 8) Spring upper perch provides independence between the spring and the pillow-ball 9) Billet T6061 lightweight aluminum Lower mounts with low torque maintenance free spherical bearings 10) All aluminum components are hard anodized 11) 2 collar wrenches are included 12) Lifetime manufacturer defect warranty **If using front drop knuckles/roll center correction knuckles, you will need to use a longer than stadard shock. Contact us for options.