BMW 340i Performance Air Intake - Dinan - Semi-Open Carbon Fiber - 16-18. A purpose-built upgrade for the B58-powered F30 that improves airflow, sharpens response, and lets authentic turbo sounds be heard.

Dinan reworks the factory layout with a larger carbon fiber airbox and a 34% bigger filter, a smooth carbon intake tube free of OE baffles/Helmholtz chamber, and an air mass meter housing that is 8% larger. The result is less restriction, cleaner flow, and a more direct induction note. On a stock B58, Dinan testing recorded gains of up to 15 hp and 13 lb-ft at 6000 RPM. A revised semi-open lid adds an auditory port, and the system can pair with the optional Dinan turbo inlet for a full tract.

Features

• Semi-open design for pronounced induction and turbo sound
• Full carbon fiber airbox and intake tube
• 34% larger filter area (102.1 in² vs 76.3 in²)
• 30% larger airbox volume for increased breathability
• 8% larger air mass meter housing
• Improved throttle response; straightforward, direct-fit install
• Fits 2016-2018 BMW 340i (B58)

Have questions or want expert guidance? Call our Austin, TX or Los Angeles, CA area stores for installation and customization services at 512-982-9393 (TX) or 562-981-6800 (CA). Considering multiple items? Contact us for potential shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov