Mor-Flow cat (hollowed out) H-Pipe - unbeatable price - free! Local pickup only
This Mor-Flow H-pipe is a few years old but the aluminized piping seems to resist corrosion pretty well IMO. I beat out the cats with a crowbar a while back after they started rattling. This setup is good where they do a visual inspection only. It has the bungs for the O2 sensors and an extra for a wideband, though the threads got messed up when I removed the last wideband sensor. It could be plugged or maybe retapped or replaced or an extension welded onto it.
Anyway, the price is unbeatable at free! You would have to arrange pickup - I'm in Southern NH and could probably meet halfway as I have nothing better to do now as I am not working :hick: .