Anyone have any experience with these on a 128i? I understand the set they make for the 328 will work, but it says on there website not to be used in states with emissions laws. Being in mass I need to comply with emissions. Is tgere any way I coukd use these headers and still be compliant as well as not triggering check engine light? It looks like the headers have ports on them for o2 sensors or some other sensors as well.
http://www.obxracingsports.com/products.php?pk=1692