The Dinan 19-25 BMW X4 M40i Freeflow Axleback Exhaust System is a high-performance cat-back exhaust designed to enhance both sound and weight savings on the G01/G02 M40i platform. Constructed with a no-nonsense, enlarged, straight, and unrestricted single pipe, it promotes maximum flow and a more aggressive tone. The system features Helmholtz-equipped mufflers that limit drone frequencies and help shape a signature low Dinan rumble. Its valved design allows for versatile volume control, enabling a refined sound at low RPMs and a more aggressive exhaust note at high RPMs. When paired with an exhaust valve remote, users can fully customize sound levels, switching between civility and full throttle roar with ease.
This exhaust system is compatible with 2019-2025 BMW X4 M40i models, fitting the G01/G02 chassis with the M40i engine. It is a direct bolt-on upgrade that replaces the stock axleback, offering improved performance, sound, and weight reduction. The kit includes the necessary components for installation and is suitable for street use, providing a balance of civility and performance for daily driving or spirited outings. Designed for enthusiasts seeking a customizable exhaust experience, this system enhances the vehicle’s auditory presence without sacrificing refinement.
