Suspension Secrets BMW M2/M2 Competition Adjustable Rear Traction Arms (F87)Suspension Secrets Adjustable Rear Traction Arms for the BMW F87 M2 and M2 Competition gives the car improved traction and acceleration. As the Suspension Secrets Adjustable Rear Traction Arms are fully adjustable, they can be adjusted to improve the rear axle kinematics on your F87 M2 or M2 Competition to generate much more traction. When set to the correct length, the Suspension Secrets Adjustable Rear Traction Arms cause the rear axle of your BMW