i was trying to do the same thing. Funny i didnt have to cut the bolts even with 215,000 miles on them. Wrenches work great. 12mm and 13mm do the job. The hardest part is getting the pipes to seperate. Gonna try again this weekend. The torch sounds like a good idea....i wonder if just heating it up would let it come out easier. Anyways, thanks

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1993 400e
Charlotte