Quote:
Originally Posted by TWOFORTYZ
Mufflers do not matter and are not required. I have passed with 0 mufflers several times, they are not an emissions part and are unrelated to the test being performed. It is not just about the codes, the sniffer has to test clean, evap system must work on certain vehicles, and the vehicle must pass visually as well.
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2000 and up vehicles don’t get the sniffer test.
OP technically speaking, long tube headers are not legal for road use in any state here in the USA. They move the cats from their OEM position and this is an automatic failure.