I have a JDM 96 spec and i have done the brake upgrade so i can guarantee you that:
JDM DC2-R ( 96 Spec ) = 262 mm - 4x114.3
JDM DC2-R ( 98 Spec ) = 282 mm - 5x114.3
You cannot re-use your 96' calipers with the 98' disc's, you need 98' calipers.
There are two ways of upgrading your 96 spec brakes:
1st: Redrilled 98 spec disc's to suit 4x114.3 (i did it this way, making sure they used one of the factory holes so only had to drill 3 seperate new ones)
2nd: Get 93-95 model Prelude VTI-R disc's which are 4x114.3 and 282mmx23mm the exact same as 98 spec disc's (bolt straight on)
If you are using stock 96 spec rims like me, your rims will not clear the upgraded calipers because the 98' disc's have a smaller overall depth. So you need to use a spacer (approx 2-3mm) or you need to shave the caliper so it will clear. You can either shave the front of the caliper itself or the better option is to shave the mounting bracket where the caliper bolts onto.
FYI: stock JDM 96 spec rims are 15x6 +50 offset
Hope that helps, my advise would be to get DBA Prelude VTI-R disc's with the 98 spec calipers. (older model Legend or NSX calipers would also fit and are 2 pot)
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