Category: Drivetrain
Price: $35
Private or Vendor Listing: Private Listing
Part fits (you may select multiples): R50, R52, R53, R55, R56, R57, R58, R59, R60
Location (Region): NorCal
Item Condition: Used

I have a barely used Big Daddies O2 fooler catalytic converter partial simulator.
It screws in between the O2 and pipe.
I would be inclined to say this may get rid of the CEL on high flow catted DP or a cat that is weak. In ca no more tailpipe testing on newer cars.
I tried it on my CATLESS DP and the light would return in a 4-5 days instead of in 1 day.
Read below for supporting info and experience.
Great way to get past smog with a hi flow catted DP

 

that is not an O2 simulator, those use electronics to give feedback to ECU, all that does is pull the sensor out of the flow.

I had luck using those with an aftermarket cat on wifes Miata, that ECU did not like the cheaper cat, but these can help that.

 

Actually this has a small honeycomb catalytic converter inside.
It does fool the O2 sensor and I ran around with a scanner but over time it throws a code with a completely catless DP as the warmup cycle takes too long with no cat.
The spacers do NOT work on a Mini at all as I tried them.
I feel this will work on those catted high flow DP's
Thanks
Modified the listing.

 

bump