The Cylinder Head for Isuzu 4JB1 / 4JB1T Engine / NKR (2006–2014) is engineered to deliver exceptional durability, precise valve timing, and optimal combustion efficiency. Built using premium cast iron and CNC machining, this replacement head ensures proper sealing and compression, restoring original engine performance.
Whether you’re rebuilding an engine or replacing a cracked or worn cylinder head, this OEM-spec replacement guarantees maximum reliability and a perfect fit. It provides smoother engine operation, improved fuel efficiency, and consistent power output, making it ideal for Isuzu NKR trucks.
⚙️ Key Features:
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Engine Compatibility: Isuzu 4JB1, 4JB1T diesel engines
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Vehicle Fitment: Isuzu NKR (2006–2014)
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OEM-spec construction for direct fit and perfect alignment
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High-strength cast iron for durability and heat resistance
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Precisely machined valves, seats, and ports
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Improves combustion efficiency and restores compression
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Corrosion and thermal fatigue resistant
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Ideal for engine rebuilds and performance restoration
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Ready to install – minimal preparation required
🚘 Compatible Applications:
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Engine Models: 4JB1, 4JB1T
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Vehicle Models: Isuzu NKR (2006–2014)
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Fitment Type: OEM Direct Replacement
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Application: Suitable for light commercial trucks and diesel rebuilds
Frequently Asked Questions (FAQ)
Is this cylinder head compatible with both 4JB1 and 4JB1T engines?
Yes, this cylinder head fits both naturally aspirated (4JB1) and turbocharged (4JB1T) Isuzu engines.
Which vehicles use this cylinder head?
This head is specifically designed for Isuzu NKR trucks manufactured between 2006 and 2014.
Is it made to OEM standards?
Yes, it’s produced according to OEM specifications to ensure proper fit and reliable performance.
What materials are used in this cylinder head?
It’s made from high-strength cast iron for superior durability and heat resistance.
Does the head come assembled?
The cylinder head can be ordered bare or semi-assembled depending on your requirements.
Cylinder Head | Isuzu 4JB1 / 4JB1T Engine / NKR – 2006-14
Fits: Isuzu 4JB1 / 4JB1T
Truck: NKR
Year: 2006 – 2014
Replacements: 8-97204-376-3, 5-87810-288-0, 8972043763, 5878102880




