Product Description
The Hamilton Cams 07-CC-12V178 combo brings Hamilton’s proven 178/208 “efficiency/tow” cam to your 1989–1998 12-valve Cummins with a complete kit that improves bottom-end torque, drops EGT 200–300°F, and spools quicker—perfect for daily/tow rigs that want crisp response without sacrificing drivability.
Fitment
- 1989–1998 Dodge Ram 2500/3500 with Cummins 5.9L 12-valve (VE ’89–’93, P-pump ’94–’98)
- Designed for flat tappet 12V applications; see Cross-Reference for 24V options
What’s Included
- 178/208 Camshaft (fits 1989–2018 Cummins platform)
- Heavy duty pushrods
- 165 lb valve springs
- Retainers and locks
- Lifters / tappets
Recommended Supporting Parts
- Hamilton Extreme Duty Pushrods (12V): 07-P-002
- Hamilton 165# Beehive/Conical Valve Springs (12V): 07-S-001
- Hamilton 12V Dual Valve Spring Set (for higher RPM/boost builds): 07-S-002
- Hamilton 1.45" Tappets (OE-style): 07-T-001
- Hamilton 1.45" DLC Coated Billet Tappets (performance): 07-T-002
Cross-Reference / Alternatives
- Hamilton 178/208 Cast Camshaft (stand-alone cam only): 07-C-178/208
- Hamilton 188/220 Cast Camshaft Combo (12V alternative): 07-CC-12V188
- For 24-valve owners (’98.5–’18) needing a similar 178/208 combo: 07-CC-24V178
FAQ
What gains should I expect from the 178/208 combo?Expect noticeably better low-RPM throttle response, quicker spool, and 200–300°F lower EGT on comparable fueling—ideal for towing and efficiency builds.
Is this a true drop-in for all 12V engines?It’s considered drop-in, but always verify piston-to-valve clearance. Hamilton notes you’ll want ≤0.020" piston protrusion and ≥0.055" valve face depth with a standard gasket and ~99° ICL. Oversize gaskets or valve reliefs can provide clearance when needed.
What valve springs should I pair with this cam?The kit includes 165 lb springs suitable for the intended RPM/boost range. For higher boost/RPM or aggressive fueling, step up to the dual spring set (07-S-002).
Do I need to upgrade pushrods or tappets?Heavy duty pushrods and lifters/tappets are included. For added headroom, many builds choose Hamilton’s Extreme Duty pushrods (07-P-002) and DLC tappets (07-T-002).
Any break-in tips?Prime for oil pressure before start, use quality break-in oil, run 1,200–1,500 RPM for ~5 minutes on first fire, then set lash. Re-torque the head (if applicable) before setting lash.
