https://www.borgeson.com/GM-P-S-Pump-Pressure-Valve-Shim-Kit.html
GM P/S Pump Pressure Valve Shim Kit (899001) Borgeson Universal Company
GM Power Steering Pump Pressure Valve Shim Kit includes clamping tool, 5 shims, and instructions to adjust bypass pressure on GM self-contained and Type II...
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