Bikeman Performance Polaris Patriot 9R / 850 Billet Low Elevation Head Kit

Condition: New Aftermarket - BMP Bikeman Performance

Please specify in our check out message box which Low Alt. Head kit needed 9R or 850

 Part #: 
Low altitude 850 PN:  04-318-L   40.5cc  

Low altitude 9R PN:  04-318-L-900  42cc

• BMP Billet Head Kit for 2019 & up Patriot 850 engines and the new 9R
• 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
• No tune is required when just running the head but recommend on the 850 for maximum gains / Tune required for the 9R
• BMP tune is required when running in combination with our pipe
• We recommend running BPR9ES NGK plugs
• Pump gas 91 is required

 Additional Info:

850-40.5cc is our lower 11.8:1 compression version for sea level to 6000 ft and gains 4-5 HP. The stock 12.1-12.2:1 compression ratio makes the motor's detonation sensor kick on very easily and won’t allow you to lean out the motor for extra power. By bolting on this version it allows you to lean out your machine with a fuel controller and pick up 5-6 safe horsepower. Some people have purchased this version simply to make it run cooler and less likely to set off the detonation sensor and put the sled in limp mode. This dome-design is different than others with a unique wider squish band and radius giving you great power and better reliability.