These GM combination-proportioning valves are based on the popular AC DELCO 172-1353(disc-drum) and 172-1361(disc-disc) valves. When upgrading your vehicle from drum to disc, these small items are a must.
These components ensure proper fluid transfer and contain a residual pressure valve for proper braking feel.
All valves contain a low pressure shut off valve and warning light switch to ensure driver and vehicle safety should your brake system lose hydraulic line pressure. Aftermarket imported master cylinders with built in adjustable proportioning valves DO NOT feature this and could put you and your vehicle at risk.
Mounts to the side of your master cylinder.
All of this is in kit form including:
• Chromed Aluminum Proportioning Valve
• Chrome Mounting Brackets
• Lines (OM material)
• Wire Plug
Available in 2 and 4 wheel disc applications. Please specify.
Line sizes to MC: 9/16-8 and 1/2-20 standard GM threads.
Note: Prop valve will come in either chrome or chromed aluminum depending on availability.
These components ensure proper fluid transfer and contain a residual pressure valve for proper braking feel.
All valves contain a low pressure shut off valve and warning light switch to ensure driver and vehicle safety should your brake system lose hydraulic line pressure. Aftermarket imported master cylinders with built in adjustable proportioning valves DO NOT feature this and could put you and your vehicle at risk.
Mounts to the side of your master cylinder.
All of this is in kit form including:
• Chromed Aluminum Proportioning Valve
• Chrome Mounting Brackets
• Lines (OM material)
• Wire Plug
Available in 2 and 4 wheel disc applications. Please specify.
Line sizes to MC: 9/16-8 and 1/2-20 standard GM threads.
Note: Prop valve will come in either chrome or chromed aluminum depending on availability.




