the zc throttle body at least on mine sits about 3 inches farther out than the si motor i hadso the pipe for a 90 crx is to big do they make one for it or just need to cut some out of the middle of the pipe and weld it?

 

i had mine, from a 91 DX and it swapped stright over to my ZC motor no fabrication needed.

 

I think they are the same for Si->ZC too.

Dustin

 

Just get an intake for 88-91 CRX Si. Like Dustin said, they are the same.