Also common on the LS and 4.6/5.4 Ford motors. Don't know why. Expansion difference with aluminum heads? I just replaced the Y pipe to manifold studs on my 2005 Magnum 3.5. 2 were rusted right in half. 2 were not. We are talking a 10mm stud. One on each manifold. How does that happen?
Doug

Last edited by dvw; 08/31/21 08:41 AM.