Would these headers be a high flow cat version? I have to e-check my car so i don't know if o2 sims would get me past that.
2015 M4 Mineral White/Sakhir Orange 6MT
Retired 2007 335i Montego Blue/Saddle Brown 6 MT
Retired 2006 325i Black/Black 6MT
, on Flickr[/IMG]