The factory cam leaves low rpm torque and spool on the table. The Hamilton Cams 178/208 is an efficiency and towing grind that helps spool large single turbos. It fits 5.9L and 6.7L Cummins. Hamilton lists 49 state EPA compliance on 1998-2024 engines; 12 valve certification is pending.

Specs: 178 intake and 208 exhaust duration at .050 inch, .290 intake and .310 exhaust lift, idle to 4,000 rpm. No core charge applies to this part.

Key Features & Benefits

• Results: Hamilton lists a 200-300 degree EGT drop.
• Warranty note: Hamilton only considers warranty claims when its tappets and springs are used. New lifters are recommended with any cam change.
• Drop in: Drop in on a 12 valve needs no more than .020 inch piston protrusion and at least .055 inch valve face depth with a standard head gasket and a 99 intake centerline. Otherwise run an oversize head gasket or cut valve reliefs.

Technical Specifications

• Manufacturer/Brand: Hamilton Cams
• Part Number/SKU: 07-C-178/208 (hca07-C-178-208)
• Product Type: Camshaft
• Truck Compatibility: 5.9L and 6.7L Cummins. Hamilton lists 49 state EPA compliance on 1998-2024 engines; 12 valve certification is pending
• Engine Platform: 5.9L / 6.7L Cummins
• Core Requirement: No core required

Vehicle Fitment & Technical Installation Notes

Fits 5.9L and 6.7L Cummins. Hamilton lists 49 state EPA compliance on 1998-2024 engines; 12 valve certification is pending.

Installation Tip: Check piston protrusion and valve face depth before install.