Adjustable Proportioning Valve - Black APV1 air-cleaner-assemblies 4 V8 1990 - 1991

4 V8 1990 - 1991 Chevrolet C1500 Scottsdale 262/4

5L/V6 2015 Lincoln Navigator Base 3

6L V8 1977 - 1978 Chevrolet K20 Cheyenne 305/5

7 V8 1981 - 1985 GMC C1500 Suburban 305/5 V8 1980 - 1985 GMC C2500 350/5

Adjustable Proportioning Valve - Black APV1 air-cleaner-assemblies 4 V8 1990 - 1991Universal design Adjustable Black finish Maximum pressure regulation 300 psi. Inlet port of valve: 1 8" 27 NPT Standard adaptors: 3 8" 24 for 3 16" line included Mounting hole diameter: . 250" (two) Adjustable proportioning valves are essentially pressure reducing valves and are often utilized in disc drum, disc disc and drum drum braking systems. The valve is used to control front to rear brake pressure bias and will work for all types of vehicles.