Porsche Enthusiasts Club Forum

Hi all,
I'm replacing the original clutch with a new one from frazerpart, in taking off the old one , I made a slight error in that I threw away the old ring gear absent mindedly.
I found a replacement but have a problem-
Only 6 of the 9 bolts will go through the holes in the ring gear, the centre hole of each group of three is too small!

Am I being stupid?? If not is it ok to drill out the holes?
I'm guessing this replacement ring gear is the wrong one in some way?
Regards
Les