Header install coming soon, what all will I need? We bought the header in the group buy and they will hopefully be shipped out this week. My bf and his buddy are gonna put it in, along with Catco high flow cat and 2.25" piping. Does the header already come with a new gasket(s)? We are gonna get the piping done at a local muffler shop here in town, but need to know of anything extra. Will the header just bolt right up to the existing exhaust so we can drive it to the muffler shop? Any other info appreciated.