S3 Stars EXTREME Cylinder Head Kit 
RED
recommended for elevations Sea Level to 3000 FEET

2018-2021 Beta 300RR and Trainer Enduro Models
 "Domed" piston engines 
(All other years have flat top pistons)   
replaceable combustion chamber domes 
made from the highest quality Billet aluminum 
precision machined to corrected squish angle for more efficient combustion, elimination of hot spots and better heat transfer to minimize boiling off coolant in extreme conditions

Extreme Kit:

Modifies the compression for a smooth and progressive delivery of power. Improving traction and engine control especially important in technical areas.

Its design manages to lower the temperature by eliminating the typical hot spots of the original cylinder heads.

Ideal for Extreme style riding, improving the throttle feeling