Cummins ISX15 Cylinder Head (SOHC) – New Complete - Industrial Injection - C45612

Cummins ISX15 Cylinder Head (New Complete SOHC)
If you're replacing a failed Cummins ISX15 cylinder head, you need a solution that eliminates guesswork and downtime-not another questionable reman.
This new complete ISX15 cylinder head from Industrial Injection is built for reliability in real-world heavy-duty applications. Fully assembled and ready for installation, it provides a dependable replacement for engines suffering from cracking, valve failure, or excessive wear.
Whether you're performing an in-frame overhaul or a full rebuild, this cylinder head restores proper combustion, airflow, and long-term engine performance.
Why Choose a New ISX15 Cylinder Head
Most replacement options on the market are remanufactured castings. That means reused material, unknown history, and potential for hidden issues.
This is not remanufactured.
Brand new casting
Fully assembled for faster install
Built to meet or exceed OEM specifications
Designed for consistent performance in heavy-duty use
When uptime matters, starting with a new foundation matters.
Built for Heavy-Duty Reliability
This Cummins ISX15 cylinder head is designed to handle the demands of:
Commercial trucking applications
Fleet maintenance and repair
Industrial and vocational equipment
High-load, long-run diesel environments
From daily drivers to working fleets, this head is built to perform under pressure.
What’s Included
This is a complete, ready-to-install assembly, including:
New cylinder head casting
Intake and exhaust valves
Valve springs
Valve retainers and keepers
Valve guides and seats
Pre-assembled valvetrain components
No sourcing extra parts. No assembly delays.
Common Reasons for ISX15 Cylinder Head Replacement
If you're here, chances are you're dealing with one of these:
Cracked cylinder head
Overheating damage
Valve or seat failure
Injector bore wear
Loss of compression or performance
Replacing the cylinder head restores proper sealing, airflow, and combustion efficiency-bringing the engine back to life.
Pair this cylinder head with our ISX15 Torque Lock Injector Cup Kit for added reliability in demanding applications.
ISX15 vs X15 Cylinder Head Compatibility
The Cummins ISX15 and X15 platforms are often referenced interchangeably in heavy-duty applications. This cylinder head is designed for ISX15 configurations, but always verify engine serial number and specifications before installation to ensure proper fitment.
Benefits of Replacing Your Cylinder Head
Installing a new ISX15 cylinder head helps:
Restore compression and engine efficiency
Ensure proper valve operation
Improve airflow and combustion performance
Reduce downtime during repairs
Extend engine service life
Fitment and Applications
Designed for Cummins ISX15 engines commonly found in:
Class 8 semi trucks (Kenworth, Peterbilt, Freightliner, etc.)
Commercial freight and fleet vehicles
Construction and vocational trucks
Industrial diesel equipment
Always verify engine serial number for compatibility.
Frequently Asked Questions
Is this Cummins ISX15 cylinder head new or remanufactured?
This is a brand new complete cylinder head, not remanufactured. It uses a new casting and components, eliminating the risks associated with reused or repaired cylinder heads.
What comes included with this ISX15 cylinder head?
This is a complete assembly that includes the cylinder head casting, valves, springs, retainers, keepers, guides, and seats. It comes pre-assembled to reduce installation time.
Will this fit my Cummins X15 engine?
The ISX15 and X15 platforms are often referenced together, but fitment can vary depending on engine configuration. Always verify your engine serial number to ensure compatibility before installation.
Do I need to install new injector cups with this cylinder head?
Injector cups are not included with the cylinder head. However, many builds include upgraded injector cups to address injector bore wear and improve long-term reliability in high-mileage or heavy-duty applications. We recommend pairing this with our ISX15 Torque Lock Injector Cup Kit.
What are common signs of a failing ISX15 cylinder head?
Common symptoms include loss of compression, overheating, coolant loss, white smoke, and poor engine performance. Cracks and valve issues are also common causes of failure.
Is this cylinder head ready to install?
Yes, this is a fully assembled cylinder head designed for direct replacement. However, proper installation procedures and verification of supporting components are recommended.
Why choose a new cylinder head instead of remanufactured?
A new cylinder head provides a fresh casting with no prior wear or heat cycles. This reduces the risk of hidden cracks, material fatigue, and premature failure compared to remanufactured options.