Differences between OEM B-series clutches

Hello everyone,

Could you tell me what the differences between OEM eg6/ek4/dc2/mb6 clutches are?
I looked up Exedy products and they have different product numbers: HCK2015 for eg6, HCK2043 for ek4, HCK2021 for mb6 and HCK2024 for dc2.

However, I heard that OEM dc2 clutch fits all B-series. If so, do these clutches also fit interchangeably?

Thanks in advance

No i have seen a case where a specific clutch didnt fit a certain flywheel. These where both aftermarket items though and cant for the life of me remember what it was.

Thanks a lot mate Maybe someone else knows more details?

Some earlier and aftermarket flywheels have 2 extra bolt holes,
the oem dc2 clutch has the holes in the right place to put extra bolts in even though the dc2 flywheel doesn't have the holes.

Maybe the mb6 and ek4 clutches don't have these holes.

Probably some differences between springs etc also