Exhaust cutouts?

[907DAVE]

Originally Posted by UNITY

My problem is where do I put the O2 sensors and do I do any thing to them?

It seems that if I have the cut outs before the cats that I should have the O2 sensors before them both right? If so, do I do that O2 sensor modification in the thread posted ^?

Yes, you must have your O2 sensors before your cutouts. I would place them around 8-12'' before the cutouts to eliminate any false reading caused by the negative exhaust pulses. Do not use the anti-fouler's on them either, they need to be in direct exhaust flow to be accurate and responsive.

As for the rear O2's, I would just leave them alone, no anti-fouler's.

Then all you would need is a "no cat" program designed to ignore the rear sensors to eliminate and P0420 codes, and a "cat" program that will watch the sensors.

Should be no sweat for Bill to handle.