BC Racing BR Series Coilover Kit BMW F82/F80 M3/M4 (EDC) 15-17

General:

• Mono-tube shock design
• 30 levels of damping force adjustment
• Pillowball mounts and adjustable camber plates included
• Separate Full length height adjustable
• One year warranty
• Rebuildable

Technical: 

• Coilovers use 46mm pistons and 53mm shock housings, the enlarged shock cartridges with specially designed pistons and rods provide a wide range of dampening force
• Valves are constructed of special spring steel, which outperforms stainless steels and produces longer valve life. Valve stacks use a patented deflective system to provide more precise control
• Patented concave lower locking ring, to prevent unseating
• Springs are made of SAE9254 high strength, durable steel. Compression tested at over 500,000 times with less than 5% deformation
• T6061 Aluminum utilized in spring locks and seats for strength and weight savings
• Iron lower brackets on MacPherson struts to ensure rigidity
• Piston rods are constructed of highly polished steel to lengthen oil seal life and prevent leaking
• High pressure inner rod guide seals ensure a perfect fit for consistent fade resistant damping and long shock life
• 2 step coating process utilizing nickel and chromium plating to prevent corrosion
• Newly developed lubricant oil in all shock cartridges minimizes aeration and cavitation
• An additional bearing beneath each pillowball mount provides a smooth action and prolongs the life of the pillowball itself.