[konafocuswrc]

the hole for strut is different from 00~04(early 05 used same 00~04 knuckles) and 05+.
any knuckles from 05+ has larger hole, in order to use 00~04 suspension on 05+ focus, they used massive omni kit which is basically to reduce size of hole.
so frpp didnt use 05+ knuckles for rally brake kit. they clearly used early 05 knuckles. so it is depends on built date.

when i said interchangeable, that meant..not require any additional parts to be replaced.
i didnt say anything that i cannot fit any svt front knuckle but caliper bracket hole is different, i cannot just buy svt knuckles and put caliper/caliper brackets from 00~04 regular focus without modification.
if it is exact same knuckles, then why didnt they only put calipers, caliper brackets, rotors and pads only like what frpp put svt conversion kit to 05+?

svt kit for 05+ focus, it only replaces caliper, caliper brackets, rotors and pads.
so conclusion is svt knuckles are not interchangeable to 05+ because they keep their 05+knuckles.

to use on 00~04, everything needs to be replaced.