I bought a Centerforce flywheel for my NA S5 and the appropriate counterweight, but neither came with the bolts to mount them together. I've been searching around and can't find a size, anybody know?

And is there a good place online to source fasteners? I haven't been able to find a place local that has a decent selection.

 

Get OEM ones. Two of them have a step in them that you will need.

Try mazdatrix.com or call your local dealer. Bolts are usually pretty cheap.

If you are an budget then you can get some from the forum.

 

Good call, I didn't look close enough at Mazdatrix to see they have the mounting hardware by itself in their flywheel section. I just bought a Centerforce aluminum flywheel and an ACT clutch. The last thing I need to do is cheap out on the mounting hardware for $500 worth of parts; I'll spend the money.

 

Don't forget the lock washers when you get the bolts.