Air intake hose in the BGM PRO range, suitable for Lambretta series 3 - Li, LIS, SX, TV and DL / GP and late series 2 air box elbows to fit the Dell'orto PHBL 22 and 25mm carburettor bellmouths. Can be used as standard through the airbox or can be used to run a remote air filter in the top. 
 
A big advantage of the BGM PRO intake hose is the lower outlet. Here the Spitback from the carburettor is not collectef in the hose so the idle system cannot clog.
 
Diameter Ø - 40mm (Dellorto PHBL)