New Cummins ISX / X15 Single Cam CGI Loaded Cylinder Head w/ Inconel Valves

Momentum Worx New Loaded CGI Cylinder Head for Cummins ISX 2011–2016 Single Cam and 2017+ Cummins X15 engines. Manufactured using Compacted Graphite Iron (CGI) and equipped with premium Inconel exhaust valves, this cylinder head is engineered to handle the extreme cylinder pressures and temperatures found in today's heavy-duty diesel engines.

Unlike traditional cast iron cylinder heads, CGI offers significantly greater strength, stiffness, and fatigue resistance, making it the preferred material for demanding commercial and high-performance applications. Combined with premium Inconel exhaust valves, this loaded cylinder head delivers exceptional durability and long-term reliability.

Whether you're rebuilding a stock work truck or a high-horsepower performance engine, this is a premium replacement designed to outperform conventional cylinder heads.

Features

• Brand new loaded cylinder head
• Fits 2011–2016 Cummins ISX Single Cam engines AND 2017+ Cummins X15
• Manufactured from premium Compacted Graphite Iron (CGI)
• Equipped with Inconel exhaust valves
• Fully assembled and ready for installation
• Precision machined to OEM specifications
• Designed for commercial, heavy-haul, towing, and performance applications
• Excellent replacement for worn or cracked OEM cylinder heads

Why Choose a CGI Cylinder Head?

Modern diesel engines produce tremendous cylinder pressure and thermal loads. Compacted Graphite Iron (CGI) is substantially stronger than traditional gray cast iron while maintaining excellent thermal stability.

Benefits of CGI Construction

• Increased strength over conventional cast iron
• Improved resistance to cracking
• Better fatigue resistance
• Greater dimensional stability under heavy loads
• Excellent durability in high-horsepower applications
• Longer service life in demanding commercial environments

CGI has become the preferred material for many OEM heavy-duty diesel engine components because it provides superior reliability where standard cast iron can eventually fail.

Premium Inconel Exhaust Valves

This cylinder head is equipped with high-temperature Inconel exhaust valves, providing additional protection in one of the hottest areas of the engine.

Inconel Valve Benefits

• Superior resistance to extreme exhaust temperatures
• Improved resistance to valve burning
• Increased durability under heavy towing and high-load operation
• Longer valve life
• Ideal for stock and performance engines alike

When combined with a CGI casting, Inconel valves create one of the most durable cylinder head packages available for the Cummins ISX and Cummins X15 platform.

Fits

• Cummins ISX
• Cummins ISX15
• Cummins X15
• 2011–2016 Single Cam engines
• 2017+ Cummins X15
• EPA10 EPA13 EPA 17 and EPA21 applications (verify fitment by engine serial number if needed)

Why Buy from Momentum Worx?

Momentum Worx is trusted by owner-operators, repair facilities, fleets, and diesel performance enthusiasts nationwide. We specialize in premium heavy-duty diesel components that are built to perform and backed by knowledgeable technical support.

From cylinder heads and injectors to turbochargers, exhaust manifolds, camshafts, and installation hardware, Momentum Worx delivers the quality parts your engine deserves.

When reliability matters, Momentum Worx is your trusted online source for heavy-duty diesel truck parts.

Ideal Applications

• Engine rebuilds
• Fleet maintenance
• Heavy-haul trucks
• Performance builds
• Commercial trucking
• Preventative engine replacement

OEM & Industry Cross Reference

This cylinder head replaces or crosses with the following OEM and aftermarket part numbers:

5658309
5658309RX
3686432
3686434
3686660
3686774
3686880
3686881
3687607
3688761
3688761RX
3688800
4298235
4298237
4298238
4356434
4374091
4386009
4386009RX
5394197RX
5394198RX

***Ships Flat Rate Via Pallet - any other items added to your cart at checkout will allow you to choose expedited air shipping, this will NOT apply to the cylinder head.