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Compression: 6.6:1 Compression
Sizing: 1.00mm Oversize

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.
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Compression: 6.6:1 Compression
Sizing: 1.00mm Oversize

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.", "features": [ "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" ] }, { "asin": "B0B3JVXGQX", "title": "Namura, NX-40008-4, Namura .040 Over Bore Piston Kit for Yamaha PW80 PW 80 48.00mm 48 mm", "brand": "Namura", "image": "https://m.media-amazon.com/images/I/41PxjmImZeL._SL75_.jpg", "url": "https://www.amazon.com/dp/B0B3JVXGQX?tag=atariguidz09-20", "features": [ "Manufactured by Namura" ] } ] }, "metadata": { "generated_date": "2026-09-13", "last_updated": "2026-09-13", "data_sources": [ "21motorsports.com", "denniskirk.com", "socalpowersports.com", "vividracing.com", "Amazon" ], "completeness": 0.95, "version": "1.2" } } }, "pagination": null, "nav": { "home": "/python/html6/index.html", "brands": "/python/html6/menu_brand_index/menu_brand_index_brands_87101ba214.html", "parts": "/python/html6/menu_part_index/menu_part_index_parts_909e6bf0ca.html", "attributes": "/python/html6/menu_attr_index/menu_attr_index_attributes_d7f67a250d.html" } }