for Vespa ET4 50ccm
4T AC
inner diameter: 16mm
outer diameter: 26mm
2-hole Product description
A porous manifold is an easy entrance part for false air which leads to deteriorated acceleration characteristics, a lower top speed and ?C in the worst case ?C can also cause damages to the engine. High time for a new manifold! But be careful: The scooter model is not the only decisive point here. Certain Modern Vespa models are equipped with different types of manifolds (e.g.: with one or two vacuum ports). So make sure to demount and check your manifold, before buying a new one.

With some models so called shear bolts were used. We recommend exchanging them for regular hexagon bolts when mounting the manifold.

Community User “tcpip1″ (on part no R100520040):
fits perfect, good, original and low priced”
OEM numbers (for comparisons):
969405 (PIAGGIO)