It's a mechanical-MIL. If you gut the recats, you put them between the lower O2 and the bung in the recat (or header). I don't know if this guy realises that's what it is for, hence why I asked what his codes were so I could see if there was any point to him doing that mod.

2000 SVT Turbo 295hp/269ftlb@12psi #1 for Bendix Brakes Kits! Knuckles rebuilt w/new bearings $55 AUSSIE ENDLINKS $70 Gutted pre-cats $80/set A lack of planning on your part does not constitute an emergency on mine!