I have some of the older 949 Racing 17/9/63 6ULR wheels and am stepping up to the Stoptech 328mm brake kit after getting to 2 day rotor cracking. I have extended studs, does anyone have info on what size spacer I will need to get clearance? IIRC they will not clear w/o some help. I also have 4 AP2 rears that I assume will also need some spacers, are they going to be different?
Thanks
Paul

 

I think 10mm should be sufficient (not positive) for for the 6ULR - you can test it out pretty easily. Print out the StopTech ST40 template, and when you cut the paper, just add 10mm to the hub area and don't trim it away. That should effectively put you at +53.

With the OEM ap2 v2 fronts, i used a 20mm spacer to clear. Don't know what's needed for rears.