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I suppose what this is really going to come down to is whether or not you have state emissions testing performed. If the car can't give you a readiness monitor that is favorable enough to pass emissions, it will only hurt the sales of this product.
Many people live in areas where OBD2 is a requirement. So... buy this header (or any header) if you want a slow race car you can't register for street use, I guess. But hey, at least it will be fun on the track that 1% of americans live close to. Or you can trailer it I suppose. Or buy another car that's faster... the options are there.
Basically, what I want to know: How do people register their vehicles with turbos and headers? I'm genuinely curious what is going on with the tune that disables the P0420 code. Is the emission monitor for cat function disabled? Or does the tune modify the values the computer deems is acceptable without throwing an error code?
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