I have a super duty 99 ford F250 V10 and have bolts on both sides that are broken off. They rusted out and fell off and some point and I would not be surprised if others fell off when they are replaced. I went to a local muffler man to have the muffler replaced and they are the ones who brought it to my attention. Muffler man told me they could fix both sides for around $800.00. I went to another mechanic to see what other estimates I could get and they told me they would have to lift my engine out of the car to get at the bolts and gave me and estimate around $2500.00!!! Does that seem right or do they not want to do the work?? Can this be done with the engine still in place?? Any advice would be great. Thanks