AFCO 23 Series Monotube steel body gas shocks have all the sophistication of deflective disc technology wrapped up in an economical, non-adjustable package. The 23 Series uses a floating piston design equipped with a Schrader valve to allow you to quickly vary the shock's gas pressure according to track conditions. These are sure to be the answer for any racer under constraints to experience gas shocks. • Schrader valve allows tuning with gas pressure • Performance at its best on fast or rough tracks • Owner rebuildable and serviceable • Not coil-over compatible