I am installing a Jacobs exhaust brake on my 2003 HO diesel. The kit came with a gasket that goes between the outlet of turbo and inlet of the exhaust brake. Well, needless to say I messed the gasket up while trying to install the exhaust brake. My question is this gasket really necessary and if so could I use something else? Can this gasket be purchased at the Dodge dealer? 2003 HO, 3500 DRW, Solid Black, 6 speed, 373, stock so far.