I replaced the stock o2 with my wideband, I have the innovate lc-1 with gauge but others are probably the same... It has a "simulated narrowband" signal, I took my stock o2 and cut the wire harness off of it and got my power and ground and sent my signal back out all through the harness. And if ever need be I can unplug it and stick a narrowband back in easily... But most keep the stock o2 and if they don't have a cat use the rear o2 bung or have another bung welded in pre-cat.