I believe that is an aftermarket add-on.

The B310 proportion valve is built into the Splitter and is called "NP-Valve". However that is usually mounted on the firewall, so your car may have been modified.

Regarding the add-on, I would remove it so that it does not interfere with your factory braking system.

Attach file:

---

  Splitter.jpg (152.57 KB)

on double-checking, that circled item looks like the stock NP-Valve in the stock location.

NP-Valve is not adjustable, it is automatic for varying loads. So the car will not lock up the brakes when empty or full load. B110 did not have this, but most B310 do.

Hi mate thanks for the reply...
I was told from the previous owner, the master cylinder and servo are from non abs Silvia s14....

Ah, that makes sense. The S14 has that big extension on the master cylinder

S14 Master Cylinder



So it looks like you're all set, all looks good.

the big adopter is actually a pressure regulator, which limits the rear bake pressure. i got this info while surfing internet and i did open mine to look inside it. and yes it is regulator.

Attach file:

---

  WP_20150824_004.jpg (104.41 KB)

some photos...

did electric fan conversion with Thermoswitch. fan from toyota Wish.

Attach file:

---

  WP_20150817_016.jpg (166.69 KB)


  WP_20150817_017.jpg (173.45 KB)


  WP_20150824_003.jpg (107.00 KB)