Pinasco Performance Exhaust for 150cc Genuine Stella Vespa PX (LML) ScootersPerformance exhaust for the Stella 4-stroke! Ultra-high quality performance pipe for the new Genuine 150cc 4 stroke Stella! The Pinasco Symphony exhaust system with fantastic Italian design and quality production provide performance gains up to 20%. Sounds incredible!Coupled with the 21mm carburetor (part no. 1300-1111), this pipe stands to make you smile every time you twist the throttle!**