i posted this in the civic forum but no one could tell me. why do i see lots of people looking for 88-91 prelude brake boosters for their civics? i know the prelude booster would be a great upgrade. i really want to know if it bolts right up to a 90 crx or if there is some modification. will i also need the master cylinder to go with it, or will the crx master cylinder bolt up to the prelude m. c. ?