- Engines & Components
- Cylinder Heads
- ProMaxx Performance Cummins Diesel Cylinder Heads
Brand New Replacement Diesel Cylinder Heads
ProMaxx Performance has the answer for the epidemic of cracked cylinder heads for Cummins 4BT, 6BT, 5.9L, and 6.7 engines. Developed and designed after an OE casting for direct bolt-on replacement, ProMaxx improved on casting strength and thickness in all the crack-prone areas for durability. ProMaxx diesel heads for Cummins are available as fully machined bare casting or fully assembled.
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4BT 8-Valve
1989-1998 5.9L 12-Valve 6BT
ProMaxx Performance CHR618N
ProMaxx Performance CHR618N Cylinder Head for Cummins Diesel 5.9L 6BT 12V Assembled
Cylinder HeadFits Cummins Diesel 5.9L 6BT 12-Valve 1989-1998 Dodge Pickup Assembled Sold Individually
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$733.00
Estimated to ship direct from manufacturer on 07/23/26, pending manufacturer availability.
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1998.5-2002 5.9L 24-Valve Casting #627
ProMaxx Performance CHR620N
ProMaxx Performance CHR620N Replacement Cylinder Head for 1998.5-2002 Dodge Trucks w/Cummins 5.9L 24V Non-Common Rail Diesel Engine
Replacement Cylinder Head1998.5-2002 Dodge Trucks Cummins 5.9L 24-Valve, Non-Common Rail Diesel Casting Number 627 Thicker Casting Fully-Assembled Ready-to-Install No Core Charge
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$1,897.13
Estimated to ship direct from manufacturer on 07/31/26, pending manufacturer availability.
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2007.5-2017 6.7L 24-Valve
ProMaxx Performance CHR621N
ProMaxx Performance CHR621N Cylinder Head for Cummins Diesel 6.7L 24V #7225 #7221 Common Rail Assembled
Cylinder HeadFits Cummins Diesel 6.7L 24-Valve - Common Rail Casting Number 3977225 / 3977221 2007.5-2017 Dodge Pickup Assembled Sold Individually
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$1,899.00
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