MAX VIP True Coilovers for Y50 Chassis 2006-2010 Infiniti M35, M45 and 04-09 Nissan Fuga. -18kg/mm front spring rates, 14kg/mm rear spring rates standard, but variety of spring rates available by request. - Eliminates separated rear spring and shock and converts to a true coilover for easier tuning and wider range of available spring rates. - Aggressive but smooth damper tuning - Fully threaded damper & lower mount allows vehicle height to be adjusted independent of the spring preload. Low ride height ability. - Large range of rebound adjustment is available at the turn of a knob on the top of each damper - Allows full soft to full hard damping change in just 12 clicks - Replaceable & Custom Tunable Damper - Pillow ball upper mount on front AND REAR allows you to change track width without binding the coilovers. Perfect for use with extended lower arms or extreme negative camber settings. - Spring upper perch provides independence between the spring and the pillow-ball - Billet T6061 lightweight anodized aluminum rear mounts, collars, perches. Steel front lower mounts. -PARTS SHOP MAX block text logo is precision lasered down all the threads on each damper to quickly match settings on the left and right at a glance. - Lifetime manufacturer defect warranty -BAG OVER DAMPER UPGRADEABLE for $900 * Helper springs are sold separately and will help you acheieve an even lower ride height.