Derestricted Intake Manifold – Piaggio / Gilera / Derbi / Vespa

Many stock scooters are restricted by their intake manifold, limiting airflow and performance. This open, derestricted version removes that bottleneck, providing a noticeable performance boost — especially when upgrading to a larger carburetor.

Features:

• Suitable for 17.5mm–21mm carburetors 
• Carburetor connection: 24mm–25mm

Compatible with:

• Dellorto PHVA / PHBN / PHBG 12–21mm 
• Polini CP 17.5–21mm (25mm connection)
• Gurtner & Weber 12–16mm
• TK & China 2-stroke 12–16mm
• Arreche 16–21mm