I wanna say they are just an M115 bolt... but I'm honestly not positive anymore, it's been a while

 

I don't know about these specific bolts. But the bolts used to attach the down pipe (and converter) on a 2.2, 2.5 Mopar engine is said to take specific bolts.

Other then the shoulder on these bolts they are pretty much a standard bolt. But I bought the specific bolts needed for the job at NAPA and at A/Z.

Yeah they rusted up just like a standard bolt. Usually, they snap when you try to remove them. Once I was cutting one off with a dremmel tool and just before the nut was cut through it loosened so it could now be removed with a socket. Major aggrivation moment.

I would think any bolt the right size would work on the Monte down pipe? And if you wanted case hardened buy grade 8 bolts.

 

will one of those work with the 3.5, and are they stainless cause if not im not gonna bother.

you got a lot back for your state. i usually only get like 100 bucks back from them. congrats, great to see you investing in all the right places.