I went to an exhaust shop this morning to price some exhaust work and this guy tells me he has made bigger a dp out of aluminized piping before. He then prices me one, running out the fender, for $80 labor and all. Have any of you guys done this before and what do you think of the possible quality? I also found out my fact. manifolds were junk so I'm looking for headers or noncracked fact. manifolds if anybody has some.