Quote:
Originally Posted by willy18
Ok, I finally read up on spark plug non-foulers and understand what they do. They basically just space O2 sensors further away from the exhaust gases in order to trick the ECU. Now my question is, are they necessary for headers, as well as high flow cats and test pipes?
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I didn't need one on the Comptech header that I installed.
But I am going to stack quite a few when I get a high flow cat.
(preference is to just find an 06-08 cat instead though).