what kind of steel are the exhaust bolts made from???

[bargecapt]

bought a complete cat back exhaust system for my 95 classic, and had to cut the bolts for the flange that connects the muffler pipe to the "Y" pipe.

on the "Y" pipe flange are the ends of the bolts, which look like they were pressed in, as they have a mushroom head.

i have tried drilling them out with cobalt and carbide bits, and all it does is dull the the bits.

i guess my next step is to get a torch and burn them out, unless someone here has a better idea.

carbide bits are supose to make dust out of grade 8 bolts, but these bolts are eating the bits.

[Oscar]

Does the heat harden them??

[atvsmurf]

do you need to reuse them? if so just carefully torch off the nuts, if done carefully you can reuse the bolts...

[57loboy]

I just did the y-pipe on my 95 lwb and didn't have those bolts. could be that mine had been out/off once before. I'd just cut 'em off and replace with decent quality ones. Use lots of hi-temp antiseize so you can get them off again (and you know you'll need to!)

[BullDogSix]

Mine were so rusted that the heads just twisted off when I removed my exhaust. I just knocked out the remaining parts from the muffler side with a punch. I plan on replacing them with some appropriate sized stainless hardware and plenty of anti-sieze.