Bought a 2011 E90 M3 that came with a Bomiz x pipe. It has 200 cell secondary cats and 2 resonators. It still smells and I'd rather not tune out the CEL. Mainly looking to buy an OEM x pipe but willing to trade if someone has an aftermarket one with 300 cell or higher cats in the primary position. Also willing to buy cats like GESI 300 cell if anyone has them and I'll try welding them onto the Bomiz I guess.