Speedwerx - Polaris 850 Patriot & 850 Patriot Boost Stealth Cylinder Head RB-2S165-W Black High Tensile Wire Springs

Black High Tensile Wire Springs

Collar alone is NOT a Fix

Sold individually with the jam nut

Stronger than OEM

add the ZBROZ Ski-Doo front bumper to your ride and experience the ultimate adventure

Speedwerx - Polaris 850 Patriot & 850 Patriot Boost Stealth Cylinder Head RB-2S165-W Black High Tensile Wire SpringsSpeedwerx Stealth Cylinder Head Polaris 850 Patriot 850 Patriot Boost This new twist on our Stealth Cylinder Head design is the best head option on the market to improve the throttle response and acceleration of your machine. These heads are built from raw, unfinished head castings which offers several advantages over a full billet head or our traditional Stealth Head Mod with a billet dome. Starting with a raw casting means we aren't limited to