AST Coilovers for BMW M2 F87 (M2, M2 Competition & M2 CS)

Coilovers for the F87 M2, M2 Competition and M2 CS. The 5100 Street kit is the same for all three; each of the other four series has one part number for the M2 and another for the Competition and CS, so pick the option for your car. Every kit adjusts for ride height and rebound damping.

• Five series: 5100 Street, Street Performance and Clubracing, 5200 2-Way and 5300 3-Way
• Separate kits for the M2 and for the M2 Competition and CS
• Camber-adjustable front top mounts on the Street Performance, Clubracing and motorsport kits
• 5200 and 5300: separate compression adjustment and external reservoirs

Choose your series

Every AST damper is a monotube: nothing inside can aerate or foam, which AST say keeps the valving responsive.

5100 Street, inverted (AST ACU)

The 5100 Street kit with inverted monotube dampers, adjustable for rebound damping and ride height. The front dampers are coilovers; at the rear the spring and damper stay separate, as the car was built. Springs come in the kit, which works with the car's original top mounts. AST fix the rear spring rate for each car. The rebound adjuster has 12 positions, and the dampers can be rebuilt.

AST part number: ACU-B2104SD

5100 Street Performance (AST ACT)

The 5100 Street kit with camber-adjustable top mounts added at the front. Inverted monotube dampers, adjustable for rebound damping and ride height; coilovers at the front, and a separate spring and damper at the rear as the car was built. Adjustable camber lets you set the angle of the front wheels, and with it how the front end grips. AST fix the rear spring rate for each car. The rebound adjuster has 12 positions, and the dampers can be rebuilt.

• ACT-B2104SD (M2 Competition / CS): M2 F87
• ACT-B3104SD (M2): M2 F87

5100 Clubracing (AST ACC)

The 1-way kit for cars that see track days as well as daily miles: inverted monotube coilovers front and rear, with top mounts at both ends. The front top mounts adjust for camber; the rear ones are solid. Spring rates can be changed to suit. Ride height adjusts, the rebound adjuster has 12 positions, and the dampers can be rebuilt.

• ACC-B2109SD (M2 Competition / CS): M2 F87
• ACC-B3109SD (M2): M2 F87

5200 2-Way Motorsport (AST RIV)

Rebound and compression damping each have their own adjuster, and ride height adjusts too. Compression damping sets how quickly the suspension moves in; rebound sets how quickly it extends again. The dampers work with external reservoirs, mounted remotely. The struts are inverted, which AST use because that design copes with heavy sideways loads and with braking. Where the car needs them, camber-adjustable front and solid rear top mounts are included. Spring rates can be changed, and the rebound adjuster has 12 positions. AST made it first of all for track driving.

• RIV-B2104SD (M2 Competition / CS): M2 F87
• RIV-B3104SD (M2): M2 F87

5300 3-Way Motorsport (AST RAC)

Three separate damping adjusters - rebound, low-speed compression and high-speed compression - plus adjustable ride height. Low-speed compression looks after slow, gradual movement of the suspension; high-speed compression looks after sharp, hard hits. The dampers work with external reservoirs, mounted remotely. The struts are inverted, which AST use because that design copes with heavy sideways loads and with braking. Where the car needs them, camber-adjustable front and solid rear top mounts are included. Spring rates can be changed, and the rebound adjuster has 12 positions. AST's kit for the most committed circuit drivers.

• RAC-B2104SD (M2 Competition / CS): M2 F87
• RAC-B3104SD (M2): M2 F87

The photos are AST's own sample shots of each series, not of the kit for your car, which is made for its suspension and differs in detail.

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