Cummins ISX Stage 3 Cylinder Head | M4101420HH
Stage 3 Cummins ISX15 Cylinder Head — Single Overhead Cam (SOHC) Part Number: M4101420HH
Built for the demands of the hardest working engines on the road. Our Stage 3 Cummins ISX15 cylinder head takes everything the Stage 2 offers and pushes it further — featuring an HT300 high-tensile casting and Inconel intake valves for maximum strength, heat resistance, and long-term durability.
⚠️ Important: Enter your Engine Serial Number (ESN) at checkout to confirm compatibility with your specific build. Note: This head is for single overhead cam engines only. If your engine has dual overhead cams, a different head is required.
Why choose ours?
- HT300 high-tensile casting — stronger than Stage 2, stronger than anything OEM ever offered
- Inconel intake valves — engineered to withstand extreme heat, resist corrosion, and outlast standard stainless steel valves
- Built specifically for Cummins ISX15 single overhead cam (SOHC) applications
- Covers a wide range of ISX engines from 1997 through 2010
- The go-to choice for high-output, high-mileage, and hard-use applications
If you've already been through a cheaper head and you're done replacing parts, this is the one built to last.
Enter your ESN at checkout — we'll handle the rest.