If you have the 2.6L engine, the part number of the pipe is MD113958. It might be the same for the 2.0L, but I'm not sure. The dealer name is "pipe assembly" to the "Secondary air supply system." All domestic sites I checked listed it as "discontinued" so your best bet is used from a wrecking yard or another site member. Before you start your search, remove the reed valve and the exhaust manifold shroud. Look for cracks in the manifold where the pipes join. If cracked (not an uncommon occurrence), replace the manifold as well as the pipe. If no cracks, remove the other end of the pipe where it attaches on the firewall side of the manifold just above the header pipe connection. It may be rusted to the manifold so get out the penetrating oil and remove it while trying to preserve the threads in the manifold.