25-01-13, 09:29 PM
Incase this helps anyone. I recently changed my rotten studs using 8 stainless hex bolts. I just dremeled off the ends, the size I used was M6x35. Standard exhaust studs measure M6x30ish, the extra 5mm really helps when putting the headers back on, just make sure the thread is good both ends before putting them in the head.