Read the whole first post mate..
and then my second reply was:Those bits are for converting the original brake piping to reroute them inside the car when rallying.
Personally, i'd get the whole lot, even though essentially you need the goodridge kit, the whole conversion its not necessary on a road car.
You really need a bias valve to fit before the T pipe.
"The copper pipes, t piece and bias valve you find on ebay are needed if you want to swap all the brake piping lot, which is not needed on a road car, but essential on a rally application car. "
In poor words:
You already have a valve, if you're replacing the whole piping then you can either buy a new valve, or reuse the one you have (but i dont reccomend it)
If you want to replace only the steel piping going from the valve to rear brakes, then you will screw the new copper pipe into the standard bias valve you already have on the bulkhead, in place of the old steel piping.
Now have a good look at your brake system, and you'll understand what im talking about.
Hope this helps
ahhhh ok got you! sorry yeah that was a misunderstanding on my behalf.
I basicly destroyed the old T joint when removing it from the Subframe lol.
Ive bought - t joint, rear subframe pipe kit (4 piece) and the front to rear pipe. Where abouts is the bias valve located on the car?

thank you again mate.