BMW 440i Performance Exhaust - Dinan - Axle Back, Freeflow - Polished - `17-`20
BMW 440i Performance Exhaust - Dinan - Axle Back, Freeflow - Polished - `17-`20
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Dinan BMW 440i Performance Exhaust — Axle Back, Freeflow, Polished (2017–2020). Delivers a deeper, sportier note with everyday civility.
Built for the F33/F36 440i, this axle back lowers back pressure for verified gains of +6 hp and +5 lb‑ft at 6600 RPM. It is 100% 16‑gauge 304 stainless steel and installs with factory hangers/brackets. A Helmholtz chamber curbs low‑RPM drone. Twin 89 mm (3.5 in) polished, laser‑engraved tips complete the package. The factory computer‑controlled exhaust valve is eliminated.
Features
- 2017–2020 BMW 440i F33/F36 fitment
- 100% 16‑gauge 304 stainless steel
- Helmholtz chamber reduces drone
- Twin 89 mm polished, laser‑engraved tips
- Factory exhaust valve eliminated
Questions or ready to schedule? Call 512-982-9393 (TX) or 562-981-6800 (CA). We serve Austin, Texas and the Los Angeles, California area with on‑site installation and customization. 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
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562-981-6800 (Signal Hill, CA)
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