Fits Patriot 850 & Patriot Boost models
3-4 horsepower gain
Smooth powerband
Better mid-range power
Helps maintain peak RPM 
Stainless Steel or Ceramic coated for a durable finish that keeps heat in the pipe
Perfect upgrade when running a stock pipe or even or Fat Azz single pipe 
Helps with over rev and carries RPM's to prevent rpm fade
No Gains on the 9R as they already come with a high flow Y-pipe