Billet Head Kit / Patriot 9r-850-Boost Catalyst 858 Stock thickness head gasket =

Stock thickness head gasket = 11:1 compression (100 octane needed)

We use this and our Superflow 902s dyno center to create a custom program that provides great power

2" internal stinger (low altitude 0-6

Our BMP kit has been proven to produce actual results that make big horsepower

We have extensively tested with the 2017-Up RZR XP Turbo to make the most horsepower possible using our state of the art dyno center

Billet Head Kit / Patriot 9r-850-Boost Catalyst 858 Stock thickness head gasket =When using the Billet head on 850 boost, you must run race gas tunes. You cannot run 91 fuel Billet Head Kit for 2019 & up Patriot 850, 9R, and Patriot Boost Engines Increase cooling capacity for lower running temps which helps maintain peak power Low altitude kits gain 4 5 mid range and peak horsepower High altitude kits gain 8 9 HP in the mid range and 7 8 peak BMP tune is required when running in combination with our pipe We recommend running