Ok, I know that there was a USDM Si for CRX and Hatchback, but was there one for Sedan? Was there a JDM SiR Sedan? Any information/links/whatever someone has would be incredibly helpful since no one has any info on it.

 

I don't know about JDM but in US 1990-1991 EX sedan comes with D16A6, bigger then Si brakes, power options, which de facto makes it an "Si".

 

No 88-91 EF sedan ever came as an SiR model, and never came with a b series engine.

They did however come with a 4wd model

 

There was also a 35xt limited edition model. D15B engine, but loaded with goodies.