They Allen heads. That is if they are OEM. Look down in there with a small light and you'll see.Have a jred 2159 that I’m attempting to swap a non cat muffler onto . Problem is that the bolt heads are nonexistent. I’m not shure how to get ahold of them to get them out . If they weren’t so deeply Recessed I would drill em and get an easy out in them that doesn’t seem possible any ideas??View attachment 814642View attachment 814643View attachment 814644
Plus 1.If youre swapping out the muffler and dont care about the old one it seems like angle grinder and metal cutoff wheel time you know "create" some access to the bolt heads so then you can drill / heat / weld something to them and back em out
Ahhhh I seeeThey are 1 size larger than the rest of the bolts.
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