POA Update Kit for GM & Ford for 134A #50-2551A

POA Update Kit for Chevy, GM & Ford Vehicles for 134A. US Patent # 5918476 , replaces GM # 38851 , Delco 15-51 & 15-5191. This POA Update Kit is for use with 134A refrigerant, for R-12 order 50-2551. POA valve update kits convert the A/C system to a cycling clutch type system as found on later model vehicles. Eliminates aggravating problems with sticking internal piston. Update kit includes: Pressure cycling switch, O-rings, wire harness and fitting to replace original POA valve with ports to attach oil bleed line and expansion valve equalizer tube. Made in the USA !!!