NA-50004-4K Top End Kit 92.97/+1.00 11:1 Pol
NA-50004-4K Top End Kit 92.97/+1.00 11:1 Pol
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NA-50004-4K Top End Kit 92.97/+1.00 11:1 Pol
Elevate the performance of your engine with the NA-50004-4K Top End Kit. This meticulously engineered kit is designed to enhance efficiency, durability, and overall power output, making it an essential upgrade for any serious enthusiast.
Features:
- Comprehensive Top End Kit: Includes everything you need for a complete overhaul—piston, rings, wrist pin, clips, top end bearing, and a gasket kit.
- MOS2 Coated Skirts: Features a revolutionary bonded coating that is 10 times stronger than traditional spray coatings. This unique application reduces friction, enhances heat transfer, and helps prevent cold seizures.
- Machined Smooth Heads: Designed to reflect combustion heat effectively, reducing carbon buildup. Tests have shown that this design can boost horsepower and improve fuel economy by up to 6%.
- Anodized Domes: Offers superior heat resistance and durability. Pistons with anodized domes are proven to be 75% stronger than their non-anodized counterparts.
- Hypereutectic Casting Process: This advanced process increases the silicon content, providing reduced expansion rates and enhanced wear resistance, while also enabling the pistons to withstand higher cylinder temperatures.
Upgrade to the NA-50004-4K Top End Kit and experience a new level of performance that translates into reliability and power when you need it most. Perfect for both everyday driving and high-performance applications!
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.

