Scraped coming out of a parking lot and cracked my exhaust, shop says I need 2 cats, but no emmisions here, and I dont wanna/cant spend the money. I'm close to Summit, and they probly have an off road pipe that will bolt right in, I just need to know the o2 workaround. Does the rear one really matter? Please link any cheats to this.

96 A4 V6 5speed
Magnaflow catback
custom intake

 

rear doesnt' matter, you just need a de-fouler which basically tricks the ecu. search for it...

 

From what I gather the defouler just spaces the sensor outside of the piping, and can also be done with spark plug spacers? So if I straight pipe it, I'll have to plumb these in?

 

AutoZone.com | Shopping | Accessories | Product Detail - Help 14 mm. Long Reach Spark Plug Non-Foulers with Gasket Seat

This one? 14mm?

NEVERMIND. Murphy's tried to take me today. Converters are fine, we just popped the pipe back in and tacked it. Now on to the next thing...