SDI Heavy Duty Rear Hubs for RZR 170 Optimate the Polini Variator is the

the Polini Variator is the foundation

Iridium IX Spark Plug

This does require the aRacer iLink Calibration Cable

Keihin components come stock from the factory for many leading brand names

Taida 63mm Cast Piston with machine flat top dome finish

SDI Heavy Duty Rear Hubs for RZR 170 Optimate the Polini Variator is theUpgrade the rear end of your Polaris RZR 170 with the SDI Heavy Duty Rear Hubsbuilt for riders who demand maximum durability and improved handling on and off the track. Designed by Suspension Direct Inc (SDI), these billet hubs are a proven performance upgrade over weak factory components. Engineered with both strength and weight reduction in mind, these hubs not only withstand aggressive riding and racing abuse, but also improve acceleration and