We have made a batch of special flywheel botls for type 4, they are fabbed in crome nickel steal wich is a stronger and better material than 12.9 material.
Bolts measure 13.05 so there is a good chance that you dont need to machine the flywheel to fit them, unless you want a little extra clearence, in other words the bolts fit firmly in the original holes in the type 4 flywheel.
Price for 5 bolts including shipping in europe: 49,95 euroes.
If interested, drop us an email with full name and address on
gbot@live.dkOBS: limited batch...
Regards, Jakob.