plinker 15+ Year Member Joined Aug 25, 2008 Messages 30 Points 3,101 City Northern, Wi Vehicle Year 1989 & 1990 Transmission Automatic Jul 28, 2009 #1 I removed my Y-pipe and am going to replace the bolts. They look to be 12mm, what thread pitch are they?
I removed my Y-pipe and am going to replace the bolts. They look to be 12mm, what thread pitch are they?
AllanD TRS Technical Staff TRS Technical Advisor Joined Jun 1, 2001 Messages 7,897 Points 5,101 Age 64 City East-Central Pennsylvania Vehicle Year 1987... sorta Transmission Manual Jul 30, 2009 #2 12mmx1.75 Buy a tap and run it through the manifolds before you install the new bolts. AD