NA-40003-6K Top End Kit OEM Style 67.42/+1.50 6.6:1 Yam
NA-40003-6K Top End Kit OEM Style 67.42/+1.50 6.6:1 Yam
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NA-40003-6K Top End Kit OEM Style 67.42/+1.50 6.6:1 Yam
Upgrade your engine’s performance with the NA-40003-6K Top End Kit, specifically designed for superior functionality and durability. This comprehensive kit is the perfect solution for those looking to enhance their engine's efficiency and power output.
Features:
- Complete Kit Includes: Piston, rings, wrist pin, clips, top end bearing, and gasket kit, ensuring you have everything you need for a successful installation.
- MOS2 (Teflon/Molybdenum) Coated Skirts: The unique rolled on application process creates a bond that is 10 times stronger than traditional spray coatings, enhancing heat transfer, reducing friction, and minimizing the risk of cold seizures.
- Machined Smooth Heads: Designed to reflect combustion heat and minimize carbon buildup, these heads can potentially increase horsepower and fuel economy by up to 6%.
- Anodized Domes: This feature enhances heat resistance and durability, with anodized pistons being 75% stronger than their non-anodized counterparts.
- Hypereutectic Casting Process: With higher silicon content, this process reduces expansion rates and increases wear resistance, allowing the pistons to withstand higher cylinder temperatures.
Transform your engine's performance with the NA-40003-6K Top End Kit, and experience the exceptional quality and reliability that comes with OEM style components. Whether you're a professional mechanic or a DIY enthusiast, this top end kit is engineered to meet your high-performance needs.
Shipping & Returns
Shipping & Returns
📦 Shipping:
Orders are processed within 1–2 business days. Standard delivery takes 3–7 business days, depending on your location.
↩️ Returns:
You may return or exchange products within 60 days of receiving your order. Items must be in original condition with proof of purchase. If your item is defective or damaged due to manufacturing issues, we’ll replace it at no additional cost.

