FX-10042-B High Performance Piston Kit - 0.01mm Oversized (76.81mm) with 13.5:1 Compression Ratio | Perfect for Engine Rebuilds & Performance Upgrades in Racing, Off-Road & High-Performance Vehicles

Bore: 76.81mm Compression: 13.5:1 Compression Sizing: 0.01mm OversizeMOS2 (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.2016-2017 fits HON CRF250R

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