Piaggio Maxi 125–180cc Airbox Conversion Kit with Flexible 3D-Printed Intake Hose
Increase airflow through your original airbox with additional intake ducts, an optimized inlet funnel and a flexible 3D-printed connecting hose.
This custom-developed airbox conversion kit allows you to modify the original air filter housing of your Piaggio Maxi engine for improved air intake capacity.
The system combines two additional rear air inlets, an optimized front intake funnel and a specially designed flexible 3D-printed intake hose with an OEM-inspired appearance.
It offers an intake solution for performance-oriented scooter builds while retaining the original airbox housing.
Key Features
- Improved airflow capacity: Additional air inlets increase the available intake area
- Original airbox retained: Conversion of the existing air filter housing
- Two rear intake ducts: Rectangular ducts for additional airflow
- Filtered air inlets: Filter foam with a matching retaining bracket
- Optimized front funnel: 50 mm connection diameter
- Flexible 3D-printed intake hose: Custom shape with OEM-inspired appearance
- Carburetor options: Connection solutions for different carburetor models
- Coordinated conversion system: Components developed to work together
Additional Rear Air Inlets
Two additional openings are created in the rear section of the original airbox. The supplied rectangular intake ducts are installed into these openings.
A matching filter element and retaining bracket cover the additional inlets to help prevent dirt from entering the intake system.
An optimized front intake funnel with a 50 mm connection diameter is installed in the front section.
Together, these modifications provide increased airflow capacity compared with the unmodified original airbox.
Flexible 3D-Printed Intake Hose
One of the main features of this kit is the specially developed connecting hose between the carburetor and airbox.
The hose is manufactured from flexible material using a 3D-printing process. Its design follows the appearance of the original intake connection while incorporating a geometry adapted to the conversion kit.
The flexible construction provides a practical connection between the carburetor and air filter housing.
Carburetor Compatibility
The standard configuration is intended for use with the original carburetor, with a corresponding flexible connection for Mikuni and Dellorto carburetors.
Depending on the selected version, connection solutions are also available for:
- Polini CP24 EVO
- Malossi PHBL 25 mm
- PWK 24–28 mm carburetors, including Nibbi
Please select the correct carburetor version when ordering. Connection dimensions vary between carburetor models.
Vehicle Compatibility
- Gilera Runner FX / FXR 125–180cc
- Aprilia SR 125 / 150
- Italjet Dragster 125 / 180
Compatibility applies to vehicles equipped with the corresponding Piaggio Maxi airbox.
Package Contents
- 2 rectangular rear intake ducts
- Air filter foam with matching retaining bracket
- Optimized front intake funnel with 50 mm connection diameter
- Flexible 3D-printed carburetor-to-airbox connecting hose
- Carburetor connection for the selected version
- Plug for the designated opening
- Associated connecting components and hose clamp for the selected configuration
Installation Notes
The original airbox must be modified by creating or adjusting the required openings. The additional intake ducts, filter components and front intake funnel are then installed.
The flexible intake hose connects the carburetor to the airbox.
After installation, the carburetor tuning should be checked and adjusted if necessary to account for the increased airflow.
Note: The original airbox and carburetor are not included. Installation photos are for illustration purposes. Actual performance results depend on the individual engine and carburetor setup.
NormEngineering – technical 3D-printed intake components for Piaggio Maxi performance builds.
