The B46 in your 330i or 430i is a punchy four-cylinder, and the turbo is doing most of the work. Before that turbo sees any air, it goes through a plastic inlet pipe with a resonator built in to hide the sound. That resonator costs you flow, adds turbulence, and mutes the one noise that tells you the turbo is spooling.
The Dinan Carbon Fiber Turbo Inlet Pipe replaces that factory plastic piece on the BMW G20 330i, G22/G23/G26 430i and G42 230i with a carbon fiber pipe and CNC-machined fittings. The resonator is gone and the flow path is larger and smoother. Dinan measures 24% more overall volume than the OEM inlet and an average internal diameter 12.5% larger from end to end.
What the Dinan Turbo Inlet Pipe Changes
A turbo is an air pump. The easier you make it for the compressor to pull air in, the more efficiently and responsively it works. Dinan's inlet removes the obstruction and enlarges the path for more uniform flow into the compressor. The byproduct is sound: you will hear more turbo spool and induction noise from the driver's seat.
It is real carbon fiber, not a wrapped plastic part, and it replaces a factory pipe that is known to crack with age. It is a direct OEM replacement, so there is no cutting or modifying anything else in the engine bay.
Turbo Inlet Pipe Install and California Status
Dinan lists 0.8 hours of labor, so most owners finish it in about an hour with basic hand tools. Read this before you order: this part is not legal for sale or use in the State of California. Dinan has CARB testing pending for 50-state compliance, and no CARB Executive Order number has been issued yet. Dinan part number D760-0060. Sold by AutoTecknic, an authorized Dinan dealer.
What's Included
- Dinan carbon fiber turbo inlet pipe with CNC-machined fittings
Key Features
- 24% more overall volume than the OEM inlet
- Average 12.5% larger internal diameter throughout
- Removes the factory sound resonator for more turbo sound
- Real carbon fiber construction replaces the factory plastic pipe
- CNC-machined fittings for a direct OEM-replacement fit
- Bolt-on install, about 0.8 hours
- Not legal for sale or use in California (CARB testing pending)
Vehicle Fitment
Fits the following B46-powered BMW models:
- BMW 3 Series / G20 Sedan (2019-2024): 330i
- BMW 4 Series / G22 Coupe (2021-2024): 430i
- BMW 4 Series / G23 Convertible (2021-2024): 430i
- BMW 4 Series / G26 Gran Coupe (2022-2024): 430i
- BMW 2 Series / G42 Coupe (2022-2024): 230i
Not listed for 2025 and newer models, the G29 Z4 or any B58-powered M340i, M440i or M240i.
Installation Notes
Dinan lists 0.8 hours of labor. Work on a cold engine and follow the Dinan instructions included with the part.
- Let the engine cool and remove the engine cover and any trim blocking access to the turbo inlet.
- Loosen the clamps and disconnect the factory inlet pipe from the intake side and the turbo.
- Remove the factory plastic inlet pipe.
- Install the Dinan carbon fiber inlet pipe and secure both ends with the clamps.
- Reinstall the engine cover, start the engine and check for leaks, loose clamps and warning lights.
