catless down

[ty50]

this is likely a redundant question, but if I go with a Catless DP, AND a regular new resonator and cat back, am I going to be able to keep the CEL light off with Cobb's off the shelf map?
thank you

 

[SoCalLowLife6]

I have a Catless down pipe and my CEL came on after the install. The o2 sensors are located immediately after where the cat used to be located so to avoid the CEL you would have to run a cat. I’ve read other post about people adding spacers to the o2 bung but I’ve seen mixed results.

 

[ahard48]

RAI J spacer, second jet, works every time all the time. 85% of us have been running this no issue. Havent had a CEL in 2 years.

 

[Joe_Mama]

CEL will be on if you go catless unless you get an O2 spacer and tune.

 

[zrickety]

Spacer by itself has worked for many of us. Vibrant 11619 with the middle insert has worked for me. Install at the second o2 sensor.
https://www.amazon.com/gp/product/B00AQ7972O/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1