The screw type proportioning valve CP3550-14 offers infinite adjustment within the limits of normal brake operation. With the cap screwed fully in no reduction in output pressure occurs; with the cap screwed fully out, output pressure is reduced to approximately 1/3rd of input pressure.

General Information:

To obtain the best performance using this valve, the brake balance should be biased towards the rear so that with the valve piped in to the rear line and screw cap right in (clockwise) where virtually no reductions occur, the balance is as much to the rear as will ever be needed. screwing the cap outwards to a lower setting will progressively reduce the rear line pressure giving more bias to the front, for use when more grip is available.

Nominal Ratio of 0.325.
Weight = 180g approx.

This proportioning valves is suitable for use with any brake fluid that conforms to DOT 3, DOT 4 or DOT 5.1 standards, but best all round performance will be achieved with AP Racing 600 brake fluid.

Due to internal adjustments set by AP Racing, do not strip these assemblies. Do NOT attempt any modification of these valves.
Strictly for competition use only.

  • Features Twin bore lever type for dual circuit brake systems where the original pipe runs must be retained.
  • Click on the link to download the relevant drawing.

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