Jungle store = Amazon. No 12 pts. I specifically looked for regulator bolt heads. Reason is, I can't get a socket on several of the bolts. Header tube is very close to the bolts hole, had to use open ended wrench. After finding 10mm head, I checked threads with thread a sizer.
They are 3/8 threads.
SS fastners are brittle, hence never sneeze, and tighten frequently
