1989-1998 Cummins Premium Stock Plus Head w/ Fire Rings (PDM-12VSTKH-FR)
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Description
Description
Reconditioned 12V Cummins cylinder head with fire ring grooves machined into the deck — same Premium Stock Plus build process as the PDM-12VSTKH, plus the machining required to run a fire-ring head gasket. The affordable upgrade for high-boost 12V builds where standard or O-ringed gaskets are giving up.
Heads are jet-washed, glass-beaded, and magnafluxed for cracks before any machining. New stainless valves, new heat-treated alloy guides (Rockwell 22) diamond-honed to size, multi-angle valve job on the Serdi 100, deck milled flat with MLS-compatible surface finish, and fire ring grooves cut to spec.
Assembled with new valve seals and 150 lb performance valve springs.
Features
Features
- Reconditioned 12V Cummins Cylinder Head
- Fire Ring Grooves Machined for High-Boost Builds
- New Stainless Steel Valves
- New Heat-Treated Alloy Valve Guides (Rockwell 22), Diamond-Honed
- Multi-Angle Valve Job (Serdi 100)
- Milled Flat for MLS-Compatible Surface Finish
- 150 lb Performance Valve Springs Installed
- Bolt-On Ready
- Part Number: PDM-12VSTKH-FR
Notes
Notes
- Fire ring head gasket (PDM-4068C) sold separately — required to take advantage of the fire-ring grooves.
- Head studs required — head bolts won't hold clamping load on a fire-ringed build.
- Block deck must also be machined for the fire ring grooves to seat fully. Confirm machine work on the block before final torque.
- Comes assembled but does not include the rocker assembly or pushrods.
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