brake master same as impreza?

hello

does anyone know if the br9 shares the same brake master at the impreza wrx sti that has black brembos?

reason i ask is i have fitted lexus 430 4pot calipers they are huge put still uses a 43mm piston and black rear brembos, i now seem to have a lot more brake pedal travel and a lot more modulation .so i have to use more pedal for the same braking feel, if that makes sense.

i also have ss lines. there not spongy but do feel a bit soft.there is no air trapped as i bleed the brake about 4 times. Then got my local garage to do it just to make sure

so i wonder if the wrx sti has a bigger brake master and will it be a direct fit to the br9?

gen 5 part number is 26401AJ010

thanks

ive found the answer they have different part number

br9 looks like a single piston, i could be wrong.

impreza has 2 pistons

part number 26401AG050