Proportioning Valve: 79-81 Disc x 4 NOS - GM New Old Stock - SOLD OUT NO MORE GM The wires coming out of

The wires coming out of them are in the correct colors

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

Delivery is covered on these when ordered and paid on line for supply

NOS GM - These are new GM # 549947

and the RH

Proportioning Valve: 79-81 Disc x 4 NOS - GM New Old Stock - SOLD OUT NO MORE GM The wires coming out ofSOLD 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