This M Sport 540i blends subtle carbon accents with a tuned growl. LCI taillights and RW Carbon spoiler clean up the rear profile while carbon mirror caps and a diffuser sharpen the car’s silhouette. The valved muffler and carbon fiber tips give a usable, throaty note that you can open up when you want to hear it. Throw in an MHD tune and black badges and the car takes on a confident, composed presence — comfortable on the boulevard but with enough edge to keep things interesting.