Strict emissions regulations and factory particulate filters heavily mute the glorious straight-six soundtrack of the G20 M340i. Swapping out the restrictive factory catalyst for high-flow Exhaust Downpipes drastically reduces turbo backpressure and delivers immediate throttle response. Elevate your saloon's acoustic profile with a Cat-Back Exhausts system, a road-legal GPF-back exhausts setup, or complete Tubo Back Exhausts. For track-focused builds, GPF deletes remove the restrictive filter media entirely, while premium Exhaust Tips perfectly frame your rear valance, all supported by our range of Misc Exhaust parts.