I understand all B series flywheels are interchangable, the gsr and b16 being 18lbs and the ITR being somewhere around 16lbs. However I know the bolt lengths of the GSR/ITR is different, so for a b16a (first gen) can I safely use the ITR flywheel? If so can I use the stock flywheel bolts. I understand the GSR's are too long I am jsut paranoid.

 

flywheel bolts are the same length , maybe you got auto ones?

 

There all the same as stated before. The auto bolts are shorter.