Brake Device Near MC

[PatTroy]

Anybody know what this is? Residual pressure valve?

I'm really struggling with soft brakes on my race car and this is the only part left that I have not changed.

[micbrody]

It has to be some sort of check valve. I found this online:

"A residual valve acts like a one-way or check valve to maintain brake system pressure to eliminate the problems of a spongy pedal. This 2 PSI residual valve is installed inline between the master cylinder and disc brake calipers to keep 2 PSI of residual pressure at the caliper after the brake pedal is released."

My car does not have it; though I wonder how much it improves feel of braking......very intriguing.....

[aj81spider]

That looks like the switch that triggers your brake light if one of your brake circuits fail. The front and back circuits run through it and there is a switch between them. If one loses pressure the switch flips from the center position and lights your brake light indicating a brake system failure. There should be an electrical connector on the top or bottom that has the wires that complete the circuit.