I have a slightly used (under 4K miles) Kooks High Flow Catted X-pipe (3" Inlet, 3" Center, 2.5" Outlet) for a 1997-2004 Corvette C5 & Z06. This three peice crossover pipe is for connecting Kooks headers to your factory/aftermarket 2.5" axleback. It includes both the X-pipe piece and down tube sections. Engineered from 304 stainless steel, it includes high flow catalytic converters, along with 3" inlets, 3" center section and 2.5" outlets. Part number is Kooks PT# 6109S.
These seem to sell new for $799.95 and I'll let it go for $600 shipped!!!!!