I don't see where he garuntee's no lights...right from the product page you linked us to:
"Made from 1.4301 (SS304) Stainless Steel 200cpi Catalytic Converter* 1:1 exchange to OEM Unit CAD designed *ECU may need to be coded to avoid engine management light"
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Faster, faster, faster, until the thrill of speed overcomes the fear of death… – Hunter Thompson
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