so 90 and 91 CRX Si calipers are different than 88-89 SI and pretty much every civic of those years and on. they happen to share the same brake pads as the Prelude S of 88-90, but not Si. So then, does anyone know if prelude Si calipers would fit on a CRX then?

 

hmmm.. well part numbers for the knuckles are different for S and Si. i guess thats an indication the calipers wouldnt quite be interchangable. prelude Si rotors are pretty much the same size as civic EX sedan rotors tho (1/64 bigger according to specs). so might as well just do the EX knuckle mod anyway.

interestingly, check out that upper A-arm. adjustable camber?

 

No... you want EX knuckles, and Legend V6 calipers.
You'll have to get prelude discs redrilled at 4x100mm

 

well, im just talkinga bout calipers anyway. but 88-91 preludes at 4x100 too, so no redrilling anyway.