Product Description
The Hamilton Cams 07-CC-24V178 combo is a proven 178/208 cast cam package for 1998.5–2018 Cummins 24V (5.9L & 6.7L) trucks. It’s built to improve spool-up, widen usable torque, lower EGTs, and maintain drivability in work and tow rigs.
Fitment
- 1998.5–2007.0 Ram 2500/3500 5.9L Cummins 24V
- 2007.5–2018 Ram 2500/3500 6.7L Cummins 24V
- Drop-in parameters: ≤ 0.018" piston protrusion and ≥ 0.038" valve face depth with standard gasket (oversize gasket or valve reliefs if outside spec).
What’s Included
- 178/208 camshaft (fits 1989–2018 Cummins platforms)
- 103# valve springs
- Heavy-duty pushrods (OEM to ~3000 HP range)
- Lifters / tappets
Key Specs
- RPM range: idle–~4000
- Typical EGT drop: ~200–300°F
- Use-case: low-RPM efficiency, towing, quicker turbo spool, all-around drivability
Recommended Supporting Parts
- Hamilton 12mm Pushrods (07-P-004): View product
- Hamilton Tool-Steel Retainers (07-S-004): View product
- Hamilton 1.45" Tappets (07-T-001): View product | DLC Billet (07-T-002): View product
- Hamilton 103# Valve Springs (07-S-003): View product | 110# Competition (07-S-110): View product
- Hamilton Bolt-On Cam Retainer (07-C-002): View product
Cross-Reference / Alternatives
- Hamilton 188/220 24V Combo (more top-end): 07-CC-24V188
- Hamilton 178/208 Cam Only (reuse your parts): 07-C-178/208
Break-In Notes
Prime the oiling system before first start, verify oil pressure, run 1200–1500 rpm for ~5 minutes, then adjust valves after any head re-torque (lash changes with re-torque). Follow best-practice lube and oil-change procedures after break-in.
FAQ
Is this truly drop-in?Yes—if piston protrusion is ≤ 0.018" and valve face depth is ≥ 0.038" with a standard gasket. Otherwise, use an oversize gasket or cut small valve reliefs.
What gains should I expect?Faster spool, stronger low-end torque, and ~200–300°F EGT reduction on typical builds when paired with proper tuning and airflow.
Which springs/retainers do I need?This combo includes 103# springs. For high rpm or heavy boost, consider Hamilton tool-steel retainers and, if exceeding ~4500 rpm regularly, 110# springs with steel cam/tappets.
Do I need new tappets?We strongly recommend new tappets on any cam install. Choose Hamilton 1.45" (07-T-001) or DLC billet (07-T-002) above for durability.
