5 lug rotors
 

I'm swapping my JDM 90s Ks over to 5 lug. I believe I can use the s14 rear rotors with the stock calipers. But what about the fronts. The s14 rotors are tiny bit bigger. Will my front calipers still work?
Thanks
https://i.imgur.com/mRiNqXS.jpg

from what I can find is the jdm rotor is 250x18mm. The s14 is 252x20mm and the 86 300zx is 250x20mm. Will the 2mm difference not allow it to fit?

Just drill ur stock rotors to 5 lug ones...

Sounds like a joke but thats legitimately an option

wouldn't hurt to get a cheap rotor from a chain parts store, and throw it on to see it it'll fit. I can't imagine that 2mm would make or break it, but I've been surprised before..

If they don't fit, you can always just return the parts, no harm, no foul.

This. The best solution is to test fit.