Koni Sport shock for the BMW (E82) 128i, 135i and the BMW (E9X) 328i, 328xi, 335i and 335xi coupe, sedan and convertible. This shock is most commonly referred to as the "compress to adjust" rear koni shock.
Koni Part # 8241-1236sport
NOTE: Externally adjustable rear shocks (non-M) are available under TC Kline Single Adjustable Category (Part # 8241-1275SPTC2)
These shocks are sold as each so please choose quantity 2 if a pair is needed
Note: M3 -> Koni does not make a specific shock for the M3 but TC Kline has the solution in the Single and Double Adjustable sections. Please feel free to call with questions or help.