Are they interchangeable? Front bumper from an 89 si, will it fit a 91? Both are USDM.

Thanks

 

Yes, but you need to use the 89 support too.

 

Just in case...
https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/reference-usdm-bumper-interchangeability-3056334/

 

Thanks a lot 24Ten! That's really great info. I will buy the 89 bumper because of the trench in the middle so that I can paint it red similar to EF9 bumper.

I already have all the thin side moldings and the EF9 rear bumper for my 91 Si.