I have a spec36 race car (94 325is). I have several heads as I keep destroying them. I wanted to replace the studs on the exhaust side holding down the cam barrier caps. Went to BMW and got the only part number they had for the studs. Calls for a 7 x 95mm, mine are 7x 100. Put them in and they are too short. I pulled a stud from two other m50s head and they are all 7x100mm. What gives. Where do I find 7x100mm studs? BMW only has 95mm studs.