Stainless expands and contracts 3 times more than steampipe. That is a direct quote from Kyle at 6boost. And on the contrare its not ok to heat wrap stainless or steampipe because they have welds ! Welds crack so wrong again ! I have a 6boost on my falcon and gtr I fkn know mate ! If any mani can be wrapped its the factory cast ones they have no welds !! Dumbass y don't u give Kyle a call then copy and paste what he says !