Proportioning Valve: 79-81 Disc x 4 NOS - GM New Old Stock - SOLD OUT NO MORE GM They are ok but not

They are ok but not the high quality of the GM ones but at 20% of the price

Should have cast on the rear #7834922"

If your changing your compressor

the panel that stretches from LH to RH Fender and attaches to head

This is the housing that attached to the radiator support panel behind head headlamp

Proportioning Valve: 79-81 Disc x 4 NOS - GM New Old Stock - SOLD OUT NO MORE GM They are ok but notSOLD OUT late 2025 but a REPRODUCTION Available. Last of the Genuine factory 4x Disc GM Proportioning Valves Till this last stock is sold only. Good alternatives are the reproduction PV's. For Firebirds & Trans Ams from 79 81, Carby or turbo.. with Factory Disc Brake rear end.. fits all the engine sizes, 301,400, 350, 80 Turbo & 403 etc. This is NOT for the Drum brake rear that one is listed elsewhere. What does a proportioning valve do? A