tried posting this in the Wheels and tire sections with no success, hopefully you guys could help me out.
I don't have any hx center caps and I was wondering if the si caps will fit. Also if you could tell me what size caps I should be looking for, There is a ton on ebay but they just have the size next to them and not what wheels they would fit.

- thanks

 

most wheels with 4x100 have center caps that fit hx center caps. i put some Si center caps in my old hx wheels. they fit good but they pop off real easy too. the face of the si center cap sits flush on the hx center but you'll notice the HX center is raised a little. this makes it easy for thieves to stick a flathead screwdriver in there and pry off the cap. On si wheels and integra wheels, the center caps sit inside the face of the rim almost recessed so they're a little harder to steal.

 

thanks, are there any other options out there

 

just put hx caps on it