Hey! I have two proportioning valves laying around my garage, the one that came with my N/A FC and one that came with my junkyard special turbo brake upgrade. Now that I'm putting it all together, I have no clue which one went with the turbo brakes. From the outside they look identical but once I cracked them open to clean em out, I noticed they are a little bit different.
One has a green valve with a longer spring
The other has a red (pink?) valve with a shorter spring
So which one is which?