MAX Pro coilovers for 1993+ Mazda RX7 FD3S. ~ Ultra High Range Adjustable Damper allows you to swap springs freely without a re-tune/rebuild & has very even and predictable force changes between our very defined 32 reference points on the infinitely adjustable rebound. ~Threaded lower mounts allow ride height changes to be made independently of spring preload. ~PRO coilovers are designed to be longer than the Comp coilovers to allow more shock travel and higher ride height when using drop knuckles/extended arms ~Standard Light weight linear spring rates are 18kg front and 6kg rear, but wide range of spring rates are available by request ~ Lightweight anodized aluminum mounts and collars ~ Coilovers feature pillowball top and bottom mounts to allow suspension to operate without binding the shock. These lower bearing mounts are recommedned when using extended control arms and angle kit ~Progressive microcellular foam bumpstops ~Laser logo etched threads for quick visual symmetry in height adjustments ~ Air-Spring (airbag) upgradeable *since front coilovers mount to lower control arms, changing the arm length will change ride height. We recommend using our lower arms to achieve a very low ride height.