I did a search, but couldn't find anything conclusive....do the "H" center caps from '99-'00 Si wheels fit on '98+ GSR blade/swirlie rims? Is it a perfect fit? If not, are there any Honda caps that do fit them?

 

Yes, they will fit perfectly. The 99-00 Si centercaps will fit all of the GSR 15" wheels. Theyre a perfect fit. I had them in my '99 GSR's. They wont fit in the 14" "snowflake" or whatever those wheels look like.

 

They should work. They are the same size, try a friends or something. I think just about all honda/acura center caps are the same.