With the M Performance suspension, your BMW f30 335i sedan experience becomes even more unique. The shock absorbers have been extensively tested and coordinated using strict motorsport criteria. The result is even more dynamic driving that will amaze on every straight and every corner. Front & Rear Coil Springs are not included in the kit, 2 of each, oem part#'s 31336860630 & 33536860620, are required for installation. (For vehicles without M Sport Package & M Sport Suspension, options 337A & 704A, front and rear stabilizer bars, oem part#'s 33556853474 & 31356792119, are required for installation.)