Product Description
Uncork airflow and clamp the seal with the INDUSTRIAL INJECTION PDM-67STH ported & polished performance cylinder head for the 2007.5–2018 6.7L Cummins. Fully CNC-ported with competition-built hardware, this head is engineered for big boost and reliable sealing on tuned street/strip builds.
Fitment
- 2007.5–2012 RAM 2500/3500 — 6.7L Cummins 24V
- 2013–2018 RAM 2500/3500/4500/5500 — 6.7L Cummins 24V
Key Features
- CNC ported & polished runners for increased airflow
- Fire-ringed head machining for high cylinder pressure sealing
- 36mm oversized stainless valves, high-strength guides & high-temp seats
- Drilled & tapped coolant freeze plugs in head
- Approx. 95 lb valve springs (performance rate)
What’s Included
- Complete assembled performance cylinder head (PDM-67STH)
- Performance valves, springs, guides, and seats installed
- Fire-ringed machining performed on the head (use appropriate gasket solution)
- Note: Gaskets and head studs/bolts sold separately
Recommended Parts (CPP internal links only)
- ARP 247-4204 Head Stud Kit — 625 Series (5.9/6.7L 24V)
- MAHLE HS54774-1 Upper Head Set — 2007.5–2018 6.7L Cummins
- MAHLE HS54774-4 Head Set (with Valve Cover Gasket) — 2007.5–2018
- All 6.7L Cummins Head Studs & Bolts (Category)
- 6.7L Cummins Valve Springs & Retainers (Category)
- 6.7L Cummins Cylinder Heads (Category)
Helpful Notes
- Machine work: Verify deck surface finish and flatness. Fire-ringed head requires a compatible gasket/fire-ring solution.
- Clamping: We strongly recommend ARP 625+ head studs for high boost and competition use.
- Tuning: Valve spring rate and installed height should match your cam profile and intended RPM range.
FAQ
Is this head ready to bolt on?It arrives assembled with valves, springs, guides, and seats installed. Always mock-up, check piston-to-valve, and verify spring pressures before final assembly. Pair with the correct head set and studs for best results.
Do I need fire-rings on the block too?Yes—use a matched fire-ring solution (head & block/gasket) when running elevated boost/cylinder pressure. Consult your machine shop and gasket supplier for the correct ring size and receiver grooves.
What size valves and springs are used?This performance head uses oversized stainless valves (approx. 36 mm) and ~95 lb performance springs to improve control at higher RPM and boost.
Which head studs should I choose?For tuned street/strip builds, ARP 247-4204 (625 Series) provides excellent clamping. Stock bolts are not recommended for high-boost applications.
