Why on earth do you want the sierra brake porportioning valve!!

My car passed without issues without it...(using sierra master cylinder and sierra disks+calipers)

u2u sent

Thought they only worked with heavy (tin top) size cars under breaking.

I used one on my avon before and then recenty read about not needing one then heard of others failing for not having one so thought id put one on to be safe

a lot of people use the proportioning valve off a fiat uno. works a treat and can be made to be adjustable post IVA

If you use the sierra master it will provide the correct pressure front and aft.....

those valves are for when the car is loaded it increases the rear pressure to compensate for the load.

on a kit you will never car bricks and slabs and diy things

i've got a type 9 £50 peterborough if that's any good