Sito Plus Performance for 125cc – 150cc 2-Stroke Genuine Stella and Vespa ScootersCOMPATIBILITY: Genuine – Stella 50 2T, Stella 150 2TVespa – PX Series (VLX, VNX, VSX)The best bang-for-buck ratio of all the pipes we sell. Gives a good increase in power and torque, especially in the midrange. Improved acceleration and better power for holding speedup hills, into the wind, and with a passenger, as well as a slight improvement in top speed. Sounds great too!Fits P125/150/Stella, and also can be easily modified to fit Super, VBB, VNB, Sprint, and GT. A bracket on the muffler simply needs to be cut off for these models.Don’t forget you’ll need to rejet your carb! A good starting point for stock engine is a 55/160 idle, 160 air, BE3 atomizer and a 100 main jet.**NOTE: Does not fit Stella 4T.**NOTE: Not legal for use in California on pollution controlled vehicles. Check local laws before installing.****