Intake manifold - Diaphragm intake manifold -POLINI 3-hole diaphragm- Vespa PK XL - AW=28,5mm (Dell'Orto PHBL24, Polini CP24 )

POLINI 3-hole diaphragm intake manifold with 28.5 mm connection for Vespa PK XL

As with the rotary valve intake manifolds, it is important to select the correct manifold to match the engine housing or chassis mounting type.

The advantage of the diaphragm is that the intake tract can be designed more freely. The intake time is no longer restricted by the rotary valve. This results in significantly more power and torque, especially in the lower and mid-range.