The B58 in your 540i, 840i or X5 is a strong, smooth engine hiding behind a very polite intake. BMW tuned the factory setup for silence, with a small airbox and a resonator-equipped tube that trades flow for quiet. Swap it out and the engine feels sharper and finally sounds like a turbo six.
The Dinan Carbon Fiber Cold Air Intake fits B58-powered BMW G-chassis models including the G30 540i, G11/G12 740i, G14/G15/G16 840i and the X5, X6 and X7 40i. It flows 506 CFM against 416 CFM for the stock system, a Dinan-tested 20% gain, through an airbox that is 66% larger and a filter with 44% more area.
How the Dinan Carbon Fiber Cold Air Intake Flows More
The factory intake tube carries a resonator that adds turbulence and restriction on the way to the turbo. Dinan replaces it with a smooth carbon fiber tube and a much bigger box: 250 cubic inches against 150 stock. The washable, reusable pleated cotton gauze filter grows to 82 sq in from 56.75 sq in stock. On a completely stock car, Dinan measured gains of up to 7 WHP and 12 lb-ft at 2500 RPM, right in the rpm range you use every day.
The intake is real carbon fiber, not a wrap or hydro-dipped plastic. It is also the foundation for Dinan's carbon turbo inlet on these cars. If you want maximum turbo sound later, the Dinan Turbo Inlet D760-0061 and Inlet Fit Kit D763-0100 bolt to this intake. The factory intake will not accept that inlet.
Dinan Cold Air Intake Install and Legal Status
This is a one-hour bolt-on with no cutting and no tune required, and the gains above were measured on a stock car. Before you order, know this: it is not legal for sale or use in the State of California. CARB testing is pending and no Executive Order number has been issued. Dinan part number D760-0068. Sold by AutoTecknic, an authorized Dinan dealer.
What's Included
- Carbon fiber intake system with airbox and intake tube
- Washable, reusable high-flow pleated cotton gauze filter
- Installation hardware
Key Features
- Dinan-tested 20% more airflow: 506 CFM vs 416 CFM stock
- Airbox 66% larger: 250 cu in vs 150 cu in stock
- 44% more filter area: 82 sq in vs 56.75 sq in stock
- Dinan dyno result on a stock car: up to 7 WHP and 12 lb-ft at 2500 RPM
- Replaces the factory resonator-equipped intake tube
- Washable, reusable cotton gauze filter
- Real carbon fiber construction, not a wrap or overlay
- Bolt-on install, about 1 hour, no tune required
Vehicle Fitment
Fits B58-powered BMW G-chassis 5, 6, 7, 8 and X Series models:
- BMW 540i / G30 Sedan (2017-2023): 540i, 540i xDrive
- BMW 640i Gran Turismo / G32 (2018-2019): 640i xDrive Gran Turismo
- BMW 740i / G11 and G12 Sedan (2016-2022): 740i, 740i xDrive
- BMW 840i / G14 Convertible, G15 Coupe, G16 Gran Coupe (2019-2026): 840i, 840i xDrive
- BMW X5 / G05 (2019-2026): X5 sDrive40i, X5 xDrive40i
- BMW X6 / G06 (2020-2026): X6 sDrive40i, X6 xDrive40i
- BMW X7 / G07 (2019-2026): X7 xDrive40i
- BMW X3 M40i / G01 and X4 M40i / G02 (2018-2019 only)
Exclusion: 2020 and later X3 M40i and X4 M40i are not compatible because the factory airbox changed.
Installation Notes
Most owners with basic hand tools can do this in about an hour. Work on a cool engine and follow the Dinan instructions included with the kit.
- Let the engine cool completely and remove the engine cover.
- Unclip the factory airbox, loosen the intake tube clamps and remove the airbox and resonator tube.
- Install the Dinan airbox and filter in the factory location.
- Fit the carbon intake tube and secure every clamp with the supplied hardware.
- Start the engine and confirm all connections are tight with no warning lights.
