A'PEXi proudly introduces the S1 Damper line, developed by a team of A'PEXi engineers and professional racing drivers. Ride quality and handling performance are not mutually exclusive. Almost all coilover suspension systems are designed for track use, but are not well matched for street use. In fact, most are sprung and dampened improperly for street use, which not only gives a harsh and unpleasurable ride, but also hurts grip performance when the suspension cannot conform to the terrain. To address this gap, Apex proudly introduces the S1 Damper line, with a specifically selected recipe of spring rates, oil and valving for hi-performance street cars that doubl as weekend track machines. 100% made in Japan, with precision Japanese components. Install Instructions