Tazman861 Report post Posted May 24, 2019 Hi all and no it’s not a can I fit M3 back box on my non M [emoji23] I’ve decided to fit some eBay headers to my 330ci, I’ve already fitted de cat 328 manifolds but I’m Supercharging the car and want a freer exhaust It looks to me that M3 sports cars line up with where the header will finish. Has anyone done this? Sent from my iPhone using Tapatalk Quote Share this post Link to post Share on other sites
