Isuzu NPR NQR 5.2L 4HK1 New Loaded Reinforced Cylinder Head Technical Specifications:

Isuzu NPR NQR 5.2L 4HK1 New Loaded Reinforced Cylinder Head

Fits: Isuzu NPR NQR 5.2L 4HK1 engines

Displacement: 5.2L

Year range: 2005-Present

Engine type: SOHC Diesel Electronic and non electronic variations

Cylinders: 4

Core Return Required

Product Information:

Introducing Heavy Duty Parts Companies reinforced, redesigned, and reinvigorated brand new cylinder head for the work horse of the industries Isuzu 4HK1. Our cylinder head has been redesigned to address the common flaws of the 4HK1 head such as cylinder head cracking and pre-mature valve train failure. Our cylinder head is a heavy-duty aftermarket casting that is not only thicker internally in the crack prone areas of the head but also contains a higher nickel content in the cast iron casting. The cylinder head we offer comes fully assembled with valves, springs, retainers, valve locks, new high temp  viton valve stem seals and standard size cam bearings installed. Ready to install straight out of the box and bred to work. Out work the rest with Heavy Duty Parts best!

Isuzu NPR/NQR 5.2L 4HK1 New Loaded Reinforced Cylinder Head

Elevate the performance and reliability of your Isuzu NPR/NQR 5.2L 4HK1 engine with our cutting-edge New Loaded Reinforced Cylinder Head. Crafted to the highest standards of quality and precision engineering, this cylinder head is the ultimate solution for enhancing engine performance, durability, and longevity.

Key Features:

• Enhanced Reinforcement for Unmatched Durability: Engineered with advanced materials and reinforced construction, our cylinder head ensures exceptional strength and durability, making it capable of withstanding the rigors of heavy-duty applications. Whether you’re hauling cargo or navigating challenging terrain, you can trust in the rugged reliability of our product.
• Complete Package for Convenience and Efficiency: The New Loaded Reinforced Cylinder Head comes fully equipped with all essential components, including valves, springs, seals, and guides, providing a comprehensive solution for your engine rebuilding needs. This eliminates the hassle of sourcing individual parts separately, saving you time and effort during installation.
• Precision Machining for Optimal Performance: Each cylinder head is meticulously machined to precise specifications, guaranteeing perfect fitment and seamless integration with your Isuzu 4HK1 engine. This ensures maximum efficiency and performance, allowing your engine to operate at peak levels of power and responsiveness.
• OEM Compatibility for Seamless Integration: Designed to meet or exceed OEM standards, our cylinder head is fully compatible with Isuzu NPR/NQR 5.2L 4HK1 engines, ensuring seamless integration and reliable operation. Whether you’re performing routine maintenance or conducting a complete engine overhaul, our product offers the perfect fit and performance you can count on.
• Rigorous Quality Assurance for Peace of Mind: Each cylinder head undergoes rigorous testing and inspection to ensure uncompromising quality and reliability. From material sourcing to final assembly, our product is subject to stringent quality control measures, ensuring that it meets the highest standards of performance and durability.
• Easy Installation for Minimal Downtime: With its user-friendly design, installation of the New Loaded Reinforced Cylinder Head is quick and hassle-free, minimizing downtime and maximizing productivity. Whether you’re a seasoned mechanic or a DIY enthusiast, you’ll appreciate the ease of installation and the superior performance it delivers.
• Core Return Required

Upgrade your engine with confidence and experience the difference that our premium-quality New Loaded Reinforced Cylinder Head can make. Engineered for excellence and built to last, it’s the ultimate choice for drivers and fleet operators who demand superior performance and reliability from their vehicles. Order yours today and unlock the full potential of your Isuzu-powered fleet.

Heavy Duty Parts Company – Core Returns Policy

At Heavy Duty Parts Company, core returns are essential to our ability to provide high-quality, cost-effective cylinder heads to our customers. These returned cores supply essential components, such as keepers, springs, and retainers, which are critical to engine performance.

No Core Charge – Just Send It Back!

Unlike other companies, we do not charge a core fee upfront. Instead, we rely on our customers to return their used cores to keep our supply chain running smoothly.

Why Core Returns Matter

• Many small but essential parts from cores are reused to maintain OEM-quality cylinder heads.
• Returning cores keeps prices competitive by reducing the need for costly new components.
• It supports sustainability by minimizing waste and conserving resources.

Send Back All Components

To ensure the quality and integrity of our remanufacturing process, we ask that you return all components that were originally included with your new cylinder head. This includes items such as:

• Rocker arms
• Camshafts (if applicable)
• Any other hardware that came with your purchase

Easy & Free Core Return Process

• Each purchase includes a prepaid core return label in a plastic sleeve on the box.
• Simply pack your core with all included components, attach the label, and drop it off with the carrier—no extra cost to you.
• Returned cores undergo inspection and recycling, ensuring maximum efficiency.

Customer Partnership & Sustainability

By returning your core and its components, you help maintain a reliable supply chain, ensuring we can continue offering top-quality products at the best prices. This process not only benefits your wallet but also contributes to a greener and more efficient automotive industry.

We appreciate your support in keeping our business and the industry running smoothly!

For more information and to learn about everything diesel, check out Diesel Tips and Tricks

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