Exhaust, Sito Plus - P125X, PX150, Stella

This thing really made the difference in the hilly areas of GA where I live. We are at about 1200ft in my area, so I went up to a 100 main jet and I've turned the mix screw out an additional 1/2 turn from stock setting. So far I'm running good and truly feels like getting an entirely new scooter with respect to acceleration, top speed (seriously, I went from about 53mph to 63mph), sound (pop pop popcorn!) and smell (I swear it smells like popcorn!). My little rubber stopper on my scooter stand does tend to catch the muffler when I put the scooter up on the stand, but its not damaging anything. Installing this was easy once I read through some online forums. (read before you remove the old exhaust). 

Listen to what they say about this little gem. It really makes your Stella ride safer in terms of acceleration. 

This pipe is by far the best upgrade I've made to my Stella.  I do most of my riding downtown, and this baby pulls off the line- which is all I really need.  

If you do buy this be sure to change your stock jetting to get to its full potential.  

It also adds a great 'buzzy' sound that lets 'em know you're coming!