BC Racing BR Coilovers for the 2015-2019 BMW M4 Cabrio 5-Bolt Top Mounts (F83) offer the most affordable entry into coilover suspension without sacrificing performance, comfort, build quality, vehicle height, or handling. This is done by extensively testing each vehicle, then refining the coilover characteristics as many times as needed to ensure the most well-balanced and affordable aftermarket suspension conceivable. BC Racing takes great pride in choosing spring rates for our off-the-shelf kits that strike the perfect balance between comfort and performance so you're never stuck with an oversprung suspension like many other brands sell. BC Racing offers one of the widest ranges of damping adjustment with 30-clicks of compression/rebound adjusted simultaneously on the BR Series. With meticulously chosen spring rates, damper valving, and one of the widest adjustment ranges in the industry, you can't go wrong with the BC Racing BR Series Coilover System. BC Racing BR Coilovers are the most popular coilover option from BC Racing, and one of the most popular coilovers in the automotive tuning industry. Features Highly customizable Mono-tube shock design Linear piston and damping curve Height adjustment independent of spring compression 30-clicks of simultaneous compression/rebound adjustment Front camber plates standard on applicable kits Rear camber plates available for applicable kits Custom spring rates and Swift Springs available Custom valving or valving paired for custom spring rates 2 year warranty against manufacturing defects Fully rebuildable with replacement parts Please note that not all vehicles can use camber plates in the front and/or rear. Most vehicles will have non-adjustable top mounts included, and some will reuse OEM upper mounts. Refer to the Specifications section for upper mount information. Specifications Part Number I-69-BR Part Name BR Series Coilovers Vehicle 2015-2019 BMW M4 Cabrio 5-Bolt Top Mounts Chassis Code F83 Front Springs (kg/mm) 62-160-7kg Rear Springs (kg/mm) 62-200-14kg Front Swift Springs (kg/mm) 62-152-X Rear Swift Springs (kg/mm) 62-203-X Front Camber Plates Included Rear Camber Plates Not Applicable Vehicle Fitment 2015 BMW M4 Cabrio 5-Bolt Top Mounts (F83) 2016 BMW M4 Cabrio 5-Bolt Top Mounts (F83) 2017 BMW M4 Cabrio 5-Bolt Top Mounts (F83) 2018 BMW M4 Cabrio 5-Bolt Top Mounts (F83) 2019 BMW M4 Cabrio 5-Bolt Top Mounts (F83)