Which BMW models does the Dinan 340i cold air intake fit?

The Dinan 340i cold air intake fits the B58-powered F30 BMW 340i, F22 M240i, and F32 440i (2016-2021), including the F31 and F34 340i, F23 M240i, and F33 and F36 440i body styles. All share the same B58 turbocharged inline-six.

Is this a closed or open intake?

This is a fully closed intake. The air box seals completely around the filter, isolating it from hot underhood air so the B58 draws cooler, denser air. Closed designs prioritize consistent intake temperatures and a quieter, more OEM-like character.

No tune is required to install the Dinan 340i cold air intake, and it improves airflow on its own. The largest, most repeatable gains come when the intake is combined with engine tuning, which lets the B58 take fuller advantage of the added flow.

Is the filter reusable?

Yes. The intake uses a washable, reusable high-flow cotton gauze filter that can be cleaned and re-oiled rather than replaced. The high-flow element supports the intake's added airflow while protecting the engine.

Is installation difficult?

No. The Dinan 340i cold air intake is a bolt-on installation using factory mounting points, with no cutting required. The kit includes the carbon fiber tube, closed air box, and filter needed to complete the swap.

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Description

Dinan Closed Carbon Fiber Cold Air Intake for F22 / F23 BMW M240i, F30 / F31 / F34 340i, and F32 / F33 / F36 440i

Dinan 340i closed intake is a fully sealed, carbon fiber induction system for the B58-powered F30 BMW 340i, F22 M240i, and F32 440i, along with their F31, F34, F23, F33, and F36 body styles. The fully closed airbox seals the high-flow filter away from underhood heat while an optimized carbon fiber tube cuts restriction and feeds cooler, denser air to the turbo. It makes up to 15hp and 13ft-lb at 6,000 rpm at the crank (13whp and 11wtq) with no additional modifications, delivering quicker throttle and turbo response with a clean, understated look under the hood.

Features

Larger volume airbox (30% larger than stock) that fully seals for maximum insulation from power-robbing heat
Max gains of 15hp and 13ft-lb at 6,000 rpm at the crank (13whp and 11wtq) with no additional modifications
34% increase in filter area (stock: 76.3 in², Dinan: 102.1 in²) for optimum flow
Free-flowing injection-molded air mass meter housing (8% larger than stock)
Optimized carbon fiber intake tube
Washable, reusable high-flow cotton gauze filter
Improved throttle response and a sportier sound
Quick, bolt-on installation

Applications

BMW M240i: F22, F23 | 2016-2021 | 3.0L Turbo I6 B58
BMW 340i: F30, F31, F34 | 2016-2021 | 3.0L Turbo I6 B58
BMW 440i: F32, F33, F36 | 2016-2021 | 3.0L Turbo I6 B58

Notes

50-state emissions legal on 2019-2021 F2x / F3x M240i /340i /440i under CARB EO D-176-56; earlier 2016-2018 model years are not CARB approved and not for sale or use in California
Confirm your model year before ordering to check the CARB status for your car

Frequently Asked Questions

Which BMW models does the Dinan 340i closed intake fit? The Dinan 340i closed intake fits the B58-powered F30 BMW 340i, F22 M240i, and F32 440i from 2016 through 2021, including the F31 and F34 340i, F23 M240i, and F33 and F36 440i body styles. All share the same B58 turbocharged inline-six.
Is the Dinan 340i closed intake 50-state legal? It depends on the model year. The 2019-2021 F2x/F3x M240i, 340i, and 440i are 50-state emissions legal under CARB EO D-176-56. The earlier 2016-2018 model years are not CARB approved and are not for sale or use in California. Confirm your model year before ordering to check the status for your specific car.
Does the Dinan 340i closed intake need a tune? No tune is required; the intake delivers up to 15 hp and 13 ft-lb at the crank on its own with no additional modifications. The largest, most repeatable gains come when it is combined with engine tuning, which lets the B58 take fuller advantage of the added flow through the sealed airbox and larger filter.
Is the filter on the Dinan 340i closed intake reusable? Yes. The intake uses a washable, reusable high-flow cotton gauze filter that can be cleaned and re-oiled rather than replaced, with 34% more filter area than stock. The high-flow element supports the added airflow while protecting the engine.
Is the Dinan 340i closed intake difficult to install? No. The Dinan 340i closed intake is a bolt-on installation using the factory mounting points, with no cutting required. The kit includes the carbon fiber tube, closed airbox, and filter needed to complete the swap.

About Dinan

Founded in 1979, Dinan is North America’s leading BMW tuner, developing, manufacturing, and marketing a full line of high-performance products for BMW, MINI, and Mercedes-Benz. Dinan works through a nationwide network of Authorized Dinan Performance Centers, including select BMW dealerships and independent BMW service and performance shops. The company’s warranty program, introduced in 1996 with BMW of North America’s cooperation, matches BMW’s new car warranty and covers Dinan enhancements and the vehicle itself for up to 4 years or 50,000 miles. That coverage lets BMW owners add real performance without risking their factory warranty. Automotive publications have tested Dinan-enhanced BMWs against some of the world’s most exotic sports cars for three decades, and the results consistently hold up. Despite that performance, Dinan BMWs keep the reliability and everyday civility BMW owners expect. The product line spans engine, driveline, and chassis components across the full BMW lineup, covering acceleration, cornering, and stopping power. Every Authorized Dinan Performance Center can help build anything from a single upgrade to a complete Dinan BMW.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Dinan Closed Carbon Fiber Cold Air Intake for F22 / F23 BMW M240i, F30 / F31 / F34 340i, and F32 / F33 / F36 440i [D760-0046]

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Dinan Closed Carbon Fiber Cold Air Intake for F22 / F23 BMW M240i, F30 / F31 / F34 340i, and F32 / F33 / F36 440i

Features

Applications

Notes

Frequently Asked Questions

About Dinan

Reviews