how much will high flow cats skew air/fuel reading?Replacing stock post cat o2 w WBo2
 

just curious if at WOT (and non WOT for that matter) the high flow cats will even affect my LM-1 reading. I was gonna pull one of my post cat o2s and screw his in for the time being.

Dave

This is definitely not what you would want to do. You can get a bung welded in for 20.00 at most shops after one of your pre-cat stock O2 sensor holes or before depending on how your headers are setup. You would never know exactly how bad your calibration would be off going through a catalytic converter as it loses efficiency over time as well.

If you had gutted cats though, you could use
the rear bungs with no problem ;)

problem is on my c5 vette id have to take the header off to get it welded.: ( no room

dave