(Slams pedal) skrrrrrrrrrrrppp....

Hopefully will be changing mine out by the end of the month going to Wilwood all round (was going to just do the fronts but wife insisted kit all round so who could argue with that )

You'll be happy you did. I'm running WW discs on all 4 corners on my current car. I'm using their master as well. It didn't require an adjustable proportioning valve.