Product Description
Unlock airflow on your 12-valve build with Hamilton Cams 07-H-002 Large Valves for the 1989–1998 5.9L Cummins. Oversized 45° valves increase curtain area and swirl for stronger mid-range and top-end while keeping OEM-style reliability. Machine work is required to seat these larger valves.
Fitment
- 1989–1998 Dodge Ram 2500/3500, 5.9L Cummins 12-valve (VE & P-pump heads)
- Direct fit to OEM 12V head after seat machining; set valve face at 0.055" from head surface (per Hamilton notes)
- Works with performance cam/spring packages designed for 12V heads
What’s Included
- Oversized 1.850" intake valves (45°)
- Oversized 1.750" exhaust valves (45°)
- Installation requires machining of OEM valve seats; seals/keepers/springs sold separately
Recommended Supporting Parts
- Hamilton 165# Beehive Valve Springs (12V): 07-S-001
- Hamilton 12V Dual Valve Spring Set: 07-S-002
- Hamilton Extreme Duty Pushrods (12V): 07-P-002
- Hamilton 1.45" DLC Billet Tappets: 07-T-002
- Hamilton 188/220 Cast Cam (popular street/tow): 07-C-188/220
- CPP Diesel 12V Cylinder Head (new loaded casting): CPP 12V Head
Cross-Reference / Alternatives
- OEM-size Intake Valve (standard diameter): Cummins 3802355
- OEM-size Exhaust Valve (standard diameter): Cummins 3802356
- Valve Stem Seal Set (Top-Hat style): MAHLE SS45953
- Interstate-McBee Intake Valve Kit (OEM-style): M-3802355
- Interstate-McBee Exhaust Valve Kit (OEM-style): M-3802356
FAQ
Do these valves drop into a stock 12V head?No. The valve seats must be machined to accept the larger diameters. Set the valve face at 0.055" from the head surface during machining.
What cam and spring pressure should I pair with these valves?For street/tow builds, Hamilton’s 188/220 cam with 165# beehive or dual springs is a proven combo. Higher RPM/boost setups benefit from duals and DLC tappets.
Will these work on both VE (’89–’93) and P-pump (’94–’98) engines?Yes—fitment is for all 1989–1998 12-valve 5.9L heads after proper machining.
Do I need new seals, keepers, and guides?Best practice is to install new valve stem seals and inspect/replace keepers and guides during head work. See the MAHLE SS45953 seals and OEM-style kits in Cross-Reference above.
