i think you would need a proportion valve cuz i tried to add the 300zx calipers and i had a low pedal. had to pump the brakes atleast twice so i would have pressure. but after a while it would still go back to being a low pedal. i even changed the mc to a 1" and it did nothing. i bled the system like 20 times . used countless bottles of brake fluid. checked for leaks. found no leaks.