UEM’s Sport Compact Performance Pistons feature three levels of performance. The Premium features polished crown, anti-friction skirt coating, dual forced pin oiling, and 2618 or 4032 alloy. Elite features include hard anodized crown and top ring groove, anti-friction skirt coating, lateral gas porting, and 2618 alloy. And the Extreme offers hard anodized crown and top ring groove, abradable skirt coating, thermal heat barrier, and 2618 or 4032 alloy.

Premium piston part numbers end in “C” or no letter. Elite piston part numbers end in “CA.” While Extreme piston part numbers end in “LCAT.” For more info: https://www.uempistons.com