We start with an Integra Gas Bulb Shock. These shocks have 15 psi. Note that Base Valve shocks are 1" shorter than the Schrader/Non-Schrader Valve Shocks. We then valve it according to your specifications. Please allow 2-3 days lead time. If you have any questions please call 563 659 1153 Thank you Dave
Please note: If you would like this shock to be for rough track conditions, select rough track for both compression and rebound.