Polini speed controls are one of those parts that really need to be looked at before considering any other up-grades. Improved ramp angles and overall weight reduction allows for a more consistent and improved acceleration especially once your engine begins to heat up and transfer temperature into your drive belt.
In some cases the actual variator face has a greater diameter than the stock part which allows for improved top speed as well as the expected overall increases.



Includes 6 19x15.5 6.8 Gram Roller Weights