BMW 440i Performance Air Intake - Dinan - Semi-Open Carbon Fiber - `19-`21
BMW 440i Performance Air Intake - Dinan - Semi-Open Carbon Fiber - `19-`21
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BMW 440i Performance Air Intake by Dinan, Semi-Open Carbon Fiber (2019–2021). A high-flow B58 upgrade that adds authentic turbo sound and efficient performance.
The semi-open layout combines a larger carbon fiber airbox and filter with an optimized carbon tube that removes OE baffling and the Helmholtz chamber to smooth flow. Expect quicker throttle response, less turbo strain, and measured gains of up to 15 HP and 13 lb-ft at 6000 RPM on a stock car. CARB EO D-176-56 applies to 2019–21 440i within the listed applications.
Features
- +15 HP / +13 lb-ft @ 6000 RPM (stock)
- 34% larger filter area (102.1 in²)
- 30% larger air box volume
- 8% larger Air Mass Meter housing
- Full carbon fiber build; semi-open intake sound
Questions or fitment checks? Call our Austin, TX team at 512-982-9393 or our Los Angeles, CA area shop at 562-981-6800. We offer installation and customization services at both locations.
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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