Quote:
Originally Posted by nycplumber
You need a stock X pipe and a stock file ( modified stock file in your case)
Return back to original X pipe with all 4 cats and contact ESS and tell them you need a file for NYS inspection. Search BMW FTP drive cycle and complete that to 'ready' your o2 sensors
Edit: text me if you need an X pipe to borrow but you're gonna have to give me the ride your promised! I hope your knee is doing better I'm pretty sure I tore my meniscus again.
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Thanks Andrew. Texted you. Early October for that ride if you’re still interested.