Bumped up 12.5:1 compression.

Does not require use of race gas but adding 1 gallon of 110 octane per 5 gallons of premium is recommended.

Machined from 2618 T6 high tensile forged aluminum .

Dome/Dish features smooth flowing radii and require no deburring or preparation.

JE designs are specifically engineered for extreme applications including professional competition.

Pins, pin fitment, lock and rings included.

Designed to fit 2mm oversized valves.

Pro Series are lighter and stronger than a standard piston for quicker revs.