M/C compatibility
 

are 90-91 CRX Si master cylinders (model with rear disks) the same as 88-91 civics (rear drums)?...

same in size or same in line configuration and bolt pattern?

as far as I've been told, old integras, old preludes and ef civics share the same bolt pattern and line config. sizes are 7/8, 15/16 and 13/16 respectively. now.... another thing I heard was ONLY the EX sedan 90-91 had the 15/16 master in the whole Civic family... the CRX Si I've been told has the standard master. I don't know how true that is, prolly ROBB knows... just look at the casting and it has the size cast right into it.

My 91 crx SI has the shiitty 7/8 MC.. I am upgrading to the 15/16 MC from a 1989 Prelude. :thumbup:

awesome, thanks robb and bbarbulo...