Exhaust manifold -VESPA- Vespa GS160/GS4 (VSB1T), SS180 (VSC1T), Rally180 (VSD1T)

The connecting piece is, except for the screwing point close to the raceway, almost contactlessly hidden in the ribbing of the cylinder. This means that the heat of the exhaust gases is not transferred directly to the cylinder, but is instead transferred directly into the exhaust. A trick that is a small piece of the puzzle to get the thermally stressed engines full throttle resistant.
Long time not available for the rare 160 and 180cc engines, it is now available again thanks to the initiative of Oliver Hellwig of Grand Sport. Also in his product range is a connecting piece that serves as an adapter to be able to use the exhaust systems of the 200cc engines on the 160 and 180cc engines. These have a larger nozzle diameter.