Product Description
The Hamilton Cams 07-CC-24V188 combo is a proven 188/220 cast camshaft package for 1998.5–2018 Cummins 24V (5.9L & 6.7L). It’s built to drop EGTs, add mid-range power, and improve spool-up while keeping street/tow manners. Kit includes cam, heavy-duty pushrods, 103# valve springs, and tappets for a matched valvetrain.
Fitment
- 1998.5–2018 Dodge/Ram 2500/3500, 5.9L & 6.7L 24-valve Cummins (manual or automatic)
- Works great with 66mm or smaller chargers at low RPM, or with larger singles at higher RPM; for VP44 trucks, consider the 178/208 combo.
What’s Included
- Hamilton 188/220 cast camshaft (fits 1989–2018 Cummins)
- Heavy-duty pushrods
- 103# valve springs
- Lifters / tappets
Performance notes: Typical RPM range ~1700–4500; commonly drops EGT ~200–300°F; designed to increase mid-range power.
Installation Notes
On 24V engines you’ll need ≤ .018″ piston protrusion and at least .038″ valve face depth with a standard gasket. If clearance is tight, use an oversize MLS head gasket or cut valve reliefs. Follow Hamilton’s break-in steps (prime oil system, establish oil pressure before start, initial run 1200–1500 RPM for ~5 minutes, then set lash).
Recommended Supporting / Service Parts
- Hamilton 103# Valve Springs (individual listing): 07-S-003
- Hamilton Extreme Duty 12mm Pushrods (24V 98.5–18): 07-P-004
- Hamilton 1.45″ Tappets (set): 07-T-001
Cross-Reference / Alternatives
- Hamilton 178/208 Cast Cam Combo (similar kit, milder profile): 07-CC-24V178
- Hamilton 188/220 Cast Cam Only (no springs/pushrods/tappets): 07-C-188/220
- Hamilton 188/220 Steel Cam Only (upgrade material): 07-C-188/220S
FAQ
What gains should I expect from the 188/220 combo?Expect noticeably stronger mid-range and improved spool with EGT reduction (~200–300°F typical). Final results depend on turbo, fuel, and tuning.
Is piston-to-valve clearance a concern on 24V engines?Yes—verify ≤ .018″ piston protrusion and ≥ .038″ valve face depth with a standard gasket. Use an oversize MLS gasket or cut reliefs if needed.
Can I run this on a VP44 truck?Hamilton recommends the 178/208 for VP44 applications; the 188/220 combo is better suited to common-rail 24V builds or specific higher-RPM setups.
What break-in procedure should I follow?Prime the oil system before first start, verify oil pressure, run at 1200–1500 RPM for ~5 minutes, then set lash. Re-torque the head (if applicable) before setting lash.
