Quote:
Originally Posted by MostlyHarmless
I just started digging into the research on a downpipe and came across this thread. I'm new to this, so please bear with me.
CEL - Check Engine Light
Catless DP - no catalytic converter so it won't pass California emissions test, correct?
Catted DP - includes catalytic converter so it will pass emissions.
JB4 - tuner that can clear the CEL code and also can be used to tune engine for DP, CAI, etc. for better performance. Question: does the JB4 clearing the CEL allow a catless DP to pass emissions testing? Or should I just go with a catted DP because, you know, California.
Thanks!
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Catted DP might not pass emission either.
Jb4 does not hide the CEL code, meaning you will have to clear it every 50-100 miles.
Car will not pass emission even if code has been temporarily cleared.
If you car is emission controlled in California, skip the downpipe