MAX Pro true coilovers for 1999-2005 BMW 3 series E46. ~ 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 useable shock travel and higher ride height. ~Standard spring rates are 10kg front and 6kg rear, but wide range of spring rates are available by request ~Steel front lower mounts clamp into stock E46 knuckles while the rest of the mounts and collars are lightweight anodized aluminum ~ Features rotatable front camber/caster plates with ability to be offset for use with extended control arms ~Rear coilovers feature pillowball upper and lower mounts to allow suspension to operate without bending the shock ~Progressive microcellular foam bumpstops ~Laser logo etched threads for quick visual symmetry in height adjustments ~ Air-Spring (airbag) upgradeable ~Converting to true rear coilover opens up unlimited spring setup options and allows you to install simple adjustable rear upper arms **INSTALL NOTES: Chassis reinforcement is required for this coilover conversion so you do not damage the rear shock towers. *Does not have attachment for M3 front swaybar. Must attach swaybar to lower control arms or remove swaybar. *Must use large stock washer on rear lower mounts for safety in case of bushing damage.