BMW M240i Performance Exhaust - Dinan - Free Flow Axle-Back - Polished - `17-`21
BMW M240i Performance Exhaust - Dinan - Free Flow Axle-Back - Polished - `17-`21

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BMW M240i Performance Exhaust - Dinan - Free Flow Axle-Back - Polished - 2017-2021. A precision-built axle-back that delivers a richer tone and proven gains.
Dinan reduces back pressure for a sound that is calm at cruise and assertive under throttle. Constructed from 100% 16‑gauge 304 stainless steel, it uses factory brackets and hangers. A Helmholtz chamber curbs low‑RPM drone. Twin 89 mm polished tips complete the rear. The factory exhaust valve is removed. Dyno: +6 hp and +5 lb‑ft at 6600 rpm.
Features
- Free Flow axle-back for 2017–2021 BMW M240i
- +6 hp / +5 lb‑ft @ 6600 rpm
- 100% 16‑gauge 304 stainless; Helmholtz chamber
- Factory hangers; twin 89 mm polished tips; valve removed
Questions or ready to schedule? We offer installation and customization at our Austin, Texas and Los Angeles, California area locations. Call 512-982-9393 (TX) or 562-981-6800 (CA). Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov





