I think it would be beneficial to note under Suspension that the shock is interchangeable between all generations of FJR, except Gen III ES, in both OEM and aftermarket configurations. It is common to use the Gen III shock to upgrade Gen I and Gen II suspensions, and it is a less expensive part. Similarly, an aftermarket Penske, Ohlins and other shocks are able to be transferred between all three generations, preserving that investment. The Gen III ES cannot be swapped since it requires the logic in the ECM.