Namura Technologies NA-40008-4K Top End Repair Kit - 1.00mm Oversize to 85.42mm, 10.5:1 Compression

Bore: 85.42mm
Compression: 10.5:1 Compression
Sizing: 1.00mm Oversize

Top End kit includes: piston, rings, wrist pin, clips, top end bearing, and gasket kit.
MOS2 (made with Teflon™/Molybdenum) Coated Skirts A rolled on application process provides a fits Bond™ that is 10 times stronger than other spray on coatings. Benefits include increased heat transfer, reduced friction and helping to eliminate cold seizures.
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%.
Anodized Domes Increases heat resistance and durability; pistons with anodized domes are 75% stronger than non-anodized pistons.
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.

This item fits H-D the following vehicle applications:
fits YAM YFM400 Grizzly 4x4 Auto 2007-2008
fits YAM YFM400F Kodiak 4x4 2000-2006
fits YAM YFM450F Kodiak Auto 4x4 2003-2006