Well i'm going to swap out the clutch in my Civic, now i have an extra flywheel in my garage but i don't know if it's a B or D series. I want to get it resurfaced if it's a D so i can do the job non-stop. The flywheel I have is 11 1/4 inches from end to end. Can someone measure a D series flywheel and/or a B series to let me know if this is a D or B.

 

how many bolt holes for the crank bolts?6-D series.8-B series.
remember if it is D series that there are three different diameter used on 88+ Civics.
chris