I have a '94 with 140K that needs a new catalytic converter so I've decided I might as well do the whole system from the front pipe on back at once. The part that no one wants to sell me and Walker exhaust apparently doesn't even make is the front exhaust pipe that runs between the manifold and the cat. Does anyone no why this is? There is a sensor of some type connected to it as well. The only place I found one was as a special order at the dealership for a whopping $242. Yikes!!!! TIA