I read in another thread that I need different exhaust manifold to midpipe studs on the drivers side. I read that Napa has some that will work with the prochamber. So I call napa and I tell the guy on the phone that I'm looking for new exhaust manifold studs, the ones that connect the exhaust manifold to the midpipe, and that its for a 2000 mustang gt. He takes a moment to look things up and then tells me they don't carry them. He said the latest he can look up to is 98. I ask him about that and they said they don't carry any. Whats the deal? Am I supposed to ask for something else?