BMW N47/B47 25d Turbo Inlet – High-Flow Turbo Inlet for 25d models

The RevDop Turbo Inlet for the BMW N47 and B47 25d engines was developed specifically for the differing charge configuration of the more powerful 25d variants. The aim of the development is to provide the most efficient connection possible between the intake system and the turbocharger, as well as a controlled, low-loss flow path.

Through a combination of precise spatial analysis, CAD design, and CFD flow analysis, the geometry has been specifically tailored to the requirements of 25d applications. The optimized inner contour supports more uniform flow and creates better flow conditions for the turbocharger.

Especially with performance-oriented setups and increased air demand, an optimized intake path can help to better utilize available flow reserves.

Benefits at a glance

• Developed specifically for BMW N47/B47 25d applications
• Optimized internal geometry for a more efficient air path
• Reduced flow losses in the intake area
• More uniform flow to the turbocharger
• Improved flow quality in the intake tract
• Designed for the higher air demand of the 25d engine
• Developed using 3D scanning, CAD, and CFD
• High-quality PA12 manufacturing
• Robust PU component with Shore hardness A65
• High temperature resistance
• Oil, fuel, and chemical resistance
• Precision fit to existing mounting points

Developed specifically for the BMW 25d

The 25d variants differ in their construction from the classic 16d, 18d, and 20d applications. This is precisely why the RevDop Turbo Inlet was not merely adapted, but developed as a dedicated variant for the respective intake geometry.

The design took into account the existing spatial constraints and the airflow guidance of the 25d intake system. The geometry was specifically designed to ensure the intake air is guided toward the turbocharger as controllably as possible and with fewer unnecessary flow restrictions.

Not a universal solution, but a vehicle-specific development for the 25d platform.

CFD-optimized flow geometry

The foundation of the development is a detailed technical analysis of the original intake path. With the help of CFD flow simulations, critical areas can be identified and the geometry can be further refined.

The focus is not simply on having the largest possible cross-section. What matters is how the air actually moves through the component.

The RevDop geometry is therefore designed for a more harmonious flow path and the most uniform possible inflow to the turbocharger.

More efficient air guidance for performance-oriented 25d engines

With increasing air demand, the requirements for the intake also rise. An unnecessarily restrictive or poorly shaped intake path can cause additional flow losses.

The RevDop Turbo Inlet specifically optimizes this area, creating a technical foundation for more efficient air supply to the turbocharger.

Especially in cases of software tuning, increased boost pressure, or other performance upgrades, an optimized intake can better demonstrate its benefits.

Developed based on data, not gut feeling

RevDop develops performance parts with a clearly defined engineering process:

3D scan → CAD construction → CFD flow analysis → Prototype → Test → Series production

It is not about just changing the visual appearance of a component. Every geometry is developed with a focus on function, spatial constraints, and flow behavior.

Engineering, not hype.

High-quality PA12 and PU manufacturing

The rigid component of the turbo inlet is manufactured from high-strength PA12 using industrial 3D printing.

The system is supplemented by a specially manufactured PU molded hose with Shore hardness A65.

The material combination used offers high dimensional stability and is suitable for use under the demanding conditions within the engine compartment.

Key focuses include:

• High temperature resistance
• Oil resistance
• Fuel resistance
• Chemical resistance
• Durable dimensional stability

in focus.

Plug-&-Play installation

The turbo inlet is matched to the respective 25d application and is mounted using the existing connection points.

The design is geared toward a precise installation without the need for complex modifications or custom-made intake components.

The standard resonance chamber of the air filter box is blanked off with our turbo inlet using the included adapter. This also ensures that pressure loss is reduced and the flow becomes more harmonious and efficient.

Scope of delivery

• 1x RevDop 25d turbo inlet rigid component made of PA12
• 1x Turbo inlet molded hose made of PU, Shore A65
• 1x Set of stainless steel clamps
• 1x Adapter cover

Delivery time

PRE-ORDER PHASE!!! DELIVERY TIME 3-4 WEEKS!!!

Our products are usually ready to ship within 2–3 working days, provided they are in stock.

Should an item not be available due to high demand or lack of stock, it will be manufactured using the high-quality PA12 3D printing process.

In this case, the delivery time can be up to 3 weeks.

Compatible with

BMW N47/B47 25d

Includes, among others, the corresponding:

• BMW 225d
• BMW 325d
• BMW 425d
• BMW 525d

as well as other 25d applications, provided the corresponding intake geometry matches the developed variant.