9R Boost Conversion Kit (Polaris 850 Boost)

Upgrade your Polaris 850 Boost to a 9R Boost configuration. This conversion kit is designed to increase responsiveness, improve power delivery, and provide a stronger pull throughout the RPM range. No core required! 

Kit includes:

• OEM 9R pistons
• OEM 9R cylinder
• 9R high-flow Y-pipe
• 9R powervalve assembly
• All required gaskets
• SLP billet Boost 9R cylinder head
• Indy Specialty Polaris E-VES alignment tool

Tuning Options:

• Mail-in ECU reflash required (900 ECU)
• Requires 50/50 mix of race fuel (100LL or 110) and 91 non-ethanol
• Upgrade to our tuning box/flash license and have the ability to change tunes on your own