Aftermarket Catalytic Converters

[mwa06907]

I have a 2008 Lucerne with 235K miles. A couple years ago I lost my catalytic converter due to a pothole-type situation. I replaced it with an very inexpensive aftermarket one. I've run with the cheap cat for two or three years with no performance issues but the car will throw a P420 code when it sits idling for a few minutes. I've tried the spark-plug extender work-around, but it was unsuccessful.

Now I have to get my State's emissions inspection. The State's test includes an extended period of idling so I'm certain the car won't pass.

I need to replace the catalytic converter, but really don't want to pay the price for GM one. Has anyone had good results with a particular make/model/brand of aftermarket catalytic converter? Any kind of input or suggestion would be appreciated. Thanks

 

[MelsRegal]

Try Walker

 

[Mad_Coachman]

I have a 2008 Lucerne with 235K miles. A couple years ago I lost my catalytic converter due to a pothole-type situation. I replaced it with an very inexpensive aftermarket one. I've run with the cheap cat for two or three years with no performance issues but the car will throw a P420 code when it sits idling for a few minutes. I've tried the spark-plug extender work-around, but it was unsuccessful.

Now I have to get my State's emissions inspection. The State's test includes an extended period of idling so I'm certain the car won't pass.

I need to replace the catalytic converter, but really don't want to pay the price for GM one. Has anyone had good results with a particular make/model/brand of aftermarket catalytic converter? Any kind of input or suggestion would be appreciated. Thanks

I passed for 5 years with no cat using this device. with my last car (1997 Olds 88).

O2 Simulator Angled Rear O2 Sensor Simulator clears p0420 / p0430 CEL check engine light

O2 Simulator Angled Cel Fix, Big Daddies Garage Angled Rear o2 Sensor Simulator is best to clear p0420 / p0430 codes for bad or missing catalytic converters. Just screws in no complicated wiring, this o2 simulator spaces the oxygen sensor precisely the exact distance out of the exhaust flow for...

bigdaddiesgarage.com

 

[cyber99]

I have a 2008 Lucerne with 235K miles. A couple years ago I lost my catalytic converter due to a pothole-type situation. I replaced it with an very inexpensive aftermarket one. I've run with the cheap cat for two or three years with no performance issues but the car will throw a P420 code when it sits idling for a few minutes. I've tried the spark-plug extender work-around, but it was unsuccessful.

Now I have to get my State's emissions inspection. The State's test includes an extended period of idling so I'm certain the car won't pass.

I need to replace the catalytic converter, but really don't want to pay the price for GM one. Has anyone had good results with a particular make/model/brand of aftermarket catalytic converter? Any kind of input or suggestion would be appreciated. Thanks

I had a P420 on my 2013 Verano. Replaced it with a Walker Cat $350 ( it had the original GM cat on it ) and two new Denso O2 sensors. No more codes, and passed Massachusetts inspection.