Header, Error Codes, Emissions
 

Mass resident here driving a 2019 BRZ. Wondering if anyone has installed a header that didn't throw an error code (perhaps they all do, and the code must be cleared - I don't know) and passed emissions in Mass no problem. If anyone knows of a good header - preferably UEL - that passes with flying colors, please let me know.

I thank everyone in advance!!

If you don't use a tune, it's going to throw a CEL. As for passing Mass. emissions, I cannot say.

I have catless headers and it does throw a code, however I managed to pass emissions in my area because the CEL goes away randomly, and as long as there's no CEL they wont instantly fail you. I think in my case they allow up to 4 stored codes. Check what people say from your local area.