Fluid lines reconnect straight to this valve when mounted in the stock location, since it's a direct replacement for the factory combination valve on 1978-and-newer GM vehicles running front disc/rear drum brakes.

GM Style Proportioning Valve Specs:

• 63% rear pressure reduction after the 350 psi knee point.
• 30 psi delay in the rear-to-rear circuit; failure-sender activation at 50 psi plus or minus 10 psi.
• Recommended maximum operating pressure of 2000 psi.
• Anti-dive metering delay lets rear brake pressure build before front pressure builds.
• Can be mounted off the OE location on other vehicles; fluid lines may need modification.