QUOTE(914werke @ Aug 6 2021, 03:19 PM)
QUOTE(Mark Henry @ Aug 6 2021, 12:48 PM)
I think they were only a T1 thing.
Dont think so Ive broken down many a T4 case & found them installed. Could have been from rebuilding but sure looked like they were OE
Al the type IV engine I have split had them. Porsche shows them to still be available as part number 021.101.131 E, size M10 x 1.25. Cost $3.94 each. Who know what you will get.
I did not find them in Belmetric in a grade 10.
I did find these on Mcmaster-Carr
I think the originals were a taller nut.