i am trying to take the pipe insert off the muffler to replace it and i cant get it off. it has allan wrench bolts that i cannot get to budge. help please. there is no welds that i can see. ive tried wd 40,clr,everything to break it loose and it wont budge

 

take some pb blaster and soak them up real good, and take a hammer and tap around the bolts to hopefully bust up some of the rust thats prolly around it, and also apply as much pressure on the allen head when you turn so it doesnt strip.

 

ok thanks. imma do that and use an allan wrench and pliers at he same time

 

Put some heat on it.