Disc Drum Classic Brake Proportioning Valve High Performance 1722174 1721364 Replacement Full Size Trucks (Electroplated Aluminum)

[FITMENT] Replacement for ALL 1978-1987 Full Size trucks with disc brakes in the front and drum brakes in rear. Works for 2WD 4WD, 1/2 Ton, 3/4 Ton, 1 Ton and P30 Chassis Frames.[OEM NUMBER] Reference part numbers: 1721350, 1721353, 1722187, 1722174, 1721364, 1721363, 1722215. Double check your part number for compatibility.[HIGH PERFORMANCE] Ensures proper fluid transfer with a pressure valve for safe braking, enhancing driver and vehicle safety.[5 PORT VALVE] Features a 9/16in-18 port for rear brake and dual 3/8in-24 ports for front brake. Master cylinder connections are 1/2in-20 and 7/16in-24, suitable for multiple mounting options.[DIRECT REPLACEMENT] No modification required, direct replacement valve with correct switch. Simplifies installation process without cutting wires.Spec:Item Type: Proportional ValveMaterial: ABS + MetalOEM: 172-1350 172-1353 172-2187 172-2174 172-1364 172-1363 172-2215The valve has 9/16in-18 connection for Rear Brakes and Dual 3/8in-24 ports for the front brakes. The connections from the Master Cylinder are 1/2in-20 and 7/16in-24.Fitment:Replacement for ALL 1978-1987 Full Size trucks that have disc brakes in the front and drum brakes in rear. 2WD 4WD, 1/2 Ton, 3/4 Ton, 1 Ton Even the P30 Chassis Frames.Package List：1 xProportional ValveNote：1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please us before buying to avoid unnecessary return, thanks!

• [FITMENT] Replacement for ALL 1978-1987 Full Size trucks with disc brakes in the front and drum brakes in rear. Works for 2WD 4WD, 1/2 Ton, 3/4 Ton, 1 Ton and P30 Chassis Frames.
• [OEM NUMBER] Reference part numbers: 1721350, 1721353, 1722187, 1722174, 1721364, 1721363, 1722215. Double check your part number for compatibility.
• [HIGH PERFORMANCE] Ensures proper fluid transfer with a pressure valve for safe braking, enhancing driver and vehicle safety.
• [5 PORT VALVE] Features a 9/16in-18 port for rear brake and dual 3/8in-24 ports for front brake. Master cylinder connections are 1/2in-20 and 7/16in-24, suitable for multiple mounting options.
• [DIRECT REPLACEMENT] No modification required, direct replacement valve with correct switch. Simplifies installation process without cutting wires.