Namura Standard Piston Kit NX-20030 Namura Piston kits are precision machined to Japanese OEM specifications. Using low-expansion, low-friction piston alloy resulting in an extended life span of the piston. Our Teflon coated skirts uses a rolled-on application process which provides a bond that is 10 times stronger than other spray on coatings. Benefits include increased heat transfer, reduced friction, and help 124.91