The AST 5100 Series 1-Way Coilovers for BMW 1M Coupe E82 with Divorced Rear & Front Top Mounts is a high-performance suspension system designed to give your vehicle improved handling and enhanced stability. It features a monotube design with a large 46mm diameter piston, providing superior damping control and improved ride quality. The coilovers are adjustable for ride height and feature a separate spring and shock adjustment for fine tuning. The top mounts are adjustable for camber and caster, and are made from billet aluminum for strength and durability. The kit also includes a set of high-performance front and rear sway bars to reduce body roll and improve cornering.