Quote:
Originally Posted by ScottinSSMD
Since your system is being built from the headers out, it sounds like you need a tune for this system, yes? Just wondering if the bigger pipes will throw codes for us non-tuned.
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It have no reason to give you a code if you keep your stock headers,
It will need a tune the same way any other aftermarket catless system will,
With the cats in the bypass area you should be able to move your downstream O2 sensor to that area and it should not throw a light or need a tune. (but every car is different)