Seller notes

S3 Stars Power Cylinder Head Kit Blackrecommended for elevations above 3,000 ft 1999-2017 GASGAS EC XC 300 ENDUROS 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 conditionsIncreased power and torque from bottom to top end increase acceleration and quicker throttle responsepopular with more aggr...

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