Product Description
The Hamilton Cams 07-C-188/220S Steel 188/220 is a proven drop-in profile for street/tow Cummins builds. Typical results include stronger mid-range, quicker spool, and reduced EGTs with proper supporting parts. Info straight from our listing: RPM range ~1700–4500, about 200–300°F EGT reduction, and 188°/220° @ .050" duration. Steel cores require cam tunnel bushings on many blocks; always verify clearances.
Fitment
- 1989–2018 Ram 2500/3500/4500/5500 with 5.9L or 6.7L Cummins (12V, 24V, and common-rail)
- Largest practical drop-in cam many choose for daily, tow, stock-class pulling, and street setups (check piston protrusion & valve face depth per Hamilton’s notes).
What’s Included
- Camshaft only (lifters/tappets, springs, retainer, gear, and seals sold separately).
FAQ
Do I need new lifters/tappets with this cam?Yes, Hamilton warranties cams only when paired with their lifters and springs. We recommend 1.45" tappets (07-T-001 or 07-T-002 DLC), plus proper springs for your build.
Is the 188/220S truly drop-in?It can be, but you must check piston protrusion and valve face depth per Hamilton’s specs. Many blocks also need cam tunnel bushings when running a steel core. Always check clearances.
What gains should I expect?Typical benefits are quicker spool and stronger mid-range with ~200–300°F EGT reduction (with the right tune/turbo/injector match).
Which other parts should I replace while I’m in there?We recommend a fresh cam gear (5273413), key (3902332), rear cam seal (M-4945701), and a bolt-on retainer (07-C-002 or 07-C-RETAINER).
