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NAMURA PISTONS All Namura pistons have Molybdenium/Teflon skirt coatings that minimize resistance and wear to provide extended life All Namura pistons have anodized domes that provide superior heat resistance All Namura pistons have superhigh silicone content for additional strength All Namura pistons have premium world class rings Rings will fit OEM pistonsBR/Additonal FitmentBR/19992008 HONDA TRX400EX/BR19962004 HONDA DIRT BIKE XR400R

MOS2 (Teflon/Molybdenum) Coated Skirts - A rolled on application process provides a bond that is 10 times stronger than other spray on coatings. Benefits include increased heat transfer, reduced friction and helping to eliminate cold seizures<br/>Machined Smooth Heads - Reflects combustion heat and reduces carbon buildup, protecting the top of the piston. Some tests have shown this feature can increase horsepower and fuel economy by up to 6%<br/>Anodized Domes - Increases heat resistance and durability; pistons with anodized domes are 75% stronger than non-anodized pistons<br/>Hypereutectic Casting Process - Provides higher silicon content for reduced expansion rates and additional wear resistance; it also has an ability to withstand higher cylinder temperatures