This 2015 428i keeps things simple but effective: Rev9 coilovers give a planted stance and sharper body control, while an Injen intake wakes the motor up with livelier response. Tiny but thoughtful cabin updates include LED dynamic turn signal mirror markers and an Apple CarPlay screen swap for modern usability. It’s the kind of build that improves daily driving — more composed, more engaging, and more connected — without turning the car into something you can’t live with during weeknight commutes.