PROMETHEUS Pistonhead POM NEO

New form is released for improving the motion at air-supply/exhaust, fuel efficiency & airtightness at compression, and the efficiency of air-supply/exhaust. Also, the durability is about 2.6 times higher than before. Using the POM material having great fatigue resistance, friction/wear resistance, and self-lubrication. Also, it can fix the spring twisting at compression, and the load capacity of thrust bearing which elicit the maximum performance is about 2.8 times higher than before. So, it can be expected that the durability will increase. This is the best item and compatible from low rate spring to high cycle spring.