These proportioning valves are similar to what GM used on many cars in the 70's. They are non-adjustable and may require an adjustable valve in the rear brakes if needed. For use with four-wheel disc brake systems.

Instructions (PDF)

This valve is garage sale priced because it is missing the bracket.

NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS

Specs

Bottom Front Port has 3/8"-24 IFF threads - goes to one front brake
Top Front Port has 3/8"-24 IFF threads - goes to one front brake
Middle Top Port has 1/2"-20 IFF threads - comes from master cylinder
Rear Top Port has 7/16"-24 IFF threads - comes from the master cylinder
Rear Most Port has 9/16"-18 IFF threads - goes to rear brakes