Öhlins Racing Road & Track Coilover System: 2016–2018 Ford Focus RSThe hlins Racing Road & Track suspension gives customers a true racing experience in their own cars, without losing comfort when commuting to work. hlins Racing unique Dual Flow Valve (DFV) technology allows you to quickly change the stiffness of the shock absorber. When arriving at the racetrack, just turn the golden knob clockwise on the damper to set it in race mode this action changes all four areas in the damper; low and high speed compression