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Cummins Cylinder Head Wholesale | Factory-Grade ISX15, 6BT & More

Heavy-Duty Cummins Cylinder Heads: Precision Castings for Industrial Endurance

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Unmatched Cummins Reliability: Precision Combustion Heads for Heavy-Duty Freight & Power Systems

In the combustion chamber of a heavy-duty diesel engine, the cylinder head must withstand immense firing pressures and rapid thermal cycling. Supporting the global supply chain for Cummins Cylinder Heads, Ruich Value’s wholesale inventory resolves critical maintenance shortages, covering popular series including ISX15, 6BT, 6CT, KTA19 and Full Series for mixed fleets. Whether you require a fully assembled “Loaded Head” for a quick turnaround on a Kenworth ISX15 or a cost-effective “Bare Casting” for rebuilding a mechanical 6BT in an industrial excavator, our catalog provides the metallurgical durability needed to prevent cracking between the valve seats. Modern Cummins engines, particularly the ISX and QSX series, operate under extreme heat loads due to EGR systems. Our replacement heads are cast from High-Nickel Iron alloys to improve thermal conductivity and structural rigidity. Featuring hardened Stellite valve seats and precision-machined valve guides, our Complete Cylinder Heads are engineered to resist valve recession and maintain compression, ensuring your equipment delivers peak torque throughout its service life.

Buyer’s Guide: Cummins Cylinder Head Configurations

Engine Family Head Type Critical Identification
ISX15 / QSX15 (Signature 600) DOHC (Dual Cam) vs SOHC (Single Cam) Early ISX (CM870) is Dual Cam. Late ISX (CM2250/2350) is Single Cam. They are NOT interchangeable.
Mid-Range (B/C Series) (6BT, 6CT, ISB) One-Piece Solid Head Check intake valve diameter and injector bore size (7mm vs 9mm tips) for ISB/QSB applications.
Heavy Duty (N14 / KTA) (Big Cam) Individual Heads (Multiple Castings) KTA engines use individual heads per cylinder. N14 uses three heads (2 cylinders each).

Cummins Engine & Equipment Applications

Engine Series Compatible Vehicles & Machinery
ISX15 / QSX15
  • Class 8 Trucks (Peterbilt, Kenworth, Volvo)
  • John Deere 9000 Series Tractors
  • Versatile 4WD Tractors
6BT / 6CT / QSB
  • Dodge Ram 2500/3500 (12V & 24V)
  • Komatsu PC200, PC300 Excavators
  • Case IH Machinery
KTA19 / KTA38
  • Mining Haul Trucks
  • Marine Tugs & Pushers
  • Industrial Power Generators

Why Source Cummins Cylinder Heads from Ruich Value?

  • Leak-Proof Testing: Every cylinder head undergoes both hot and cold pressure testing to detect microscopic casting porosity or cracks, ensuring zero coolant leaks.
  • Loaded Options: We supply Loaded Cylinder Heads pre-assembled with valves, springs, retainers, and collets, saving machine shops hours of assembly labor.
  • Stellite Valve Seats: To combat the low-lubricity of modern Ultra-Low Sulfur Diesel (ULSD), our heads feature hardened Stellite inserts to prevent premature valve recession.
  • Deck Flatness: The gasket surface is CNC milled to an ultra-fine finish, ensuring a perfect seal with Multi-Layer Steel (MLS) head gaskets under high boost pressure.
  • Secure Packaging: All heads are protected with valve cover plates (if applicable) and secured in reinforced wooden crates to prevent damage to the deck surface during sea freight.

Available Cummins Cylinder Head Range

Explore our comprehensive catalog of replacement Engine Heads. We offer both Bare Castings and Complete Loaded Assemblies. If you do not see your specific casting number, please contact us.
ModelModelModelModel
NTA855 (Assm)ISF2.8ISX15/QSX156BTAA
K19 (Assm)ISF3.8 (Assm)ISLe (Assm) 6CT/6CT (Assm)
4B/4BT (Assm)ISDe/QSB/ISB 4.5QSL6L/6LT (Assm)
6B/6BT (Assm)ISDe 6.7 / QSB6.7 (Assm)ISM11QSB3.3/B3.3 (Assm)
ISB6 E3/E3 (Assm)QSB 5.9LISGISL/T375
ISBe 5.9 (Assm)ISC (Assm)

Looking for more components? Explore our complete Cummins Heavy Duty Diesel Engine Parts Catalog

Technical FAQ: Cummins Cylinder Heads

Q1: What is the difference between a Bare Head and a Loaded Head?

A Bare Head (Casting) comes with valve guides and seats installed but no moving parts. A Loaded Head (Complete Assembly) comes pre-installed with valves, valve springs, retainers, and valve stem seals. Buying a Loaded Head is often more cost-effective than rebuilding an old cracked core.

Q2: How do I identify if my ISX is Single Cam or Dual Cam?

Check the camshaft configuration. The early ISX (CM870) has two camshafts (one for injectors, one for valves). The later ISX15 (CM2250/2350) has a Single Overhead Cam (SOHC). The cylinder heads are completely different and cannot be interchanged.

Q3: Why do 6BT heads crack between the valves?

Overheating and high EGTs (Exhaust Gas Temperatures) cause thermal stress that cracks the “bridge” between the intake and exhaust valves. Our aftermarket 6BT Heads feature reinforced castings with improved water jackets to dissipate heat more effectively.

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