Description
Fits
| Year |
Make |
Model |
| 1989-2018 |
Dodge Ram HD |
6.7L Cummins |
These Stage 4.5 camshafts from Colt Cams will give you a longer duration & lift on the exhaust side for motors with a slight restriction, or if you want more exhaust flow and give you the strongest mid-range torque & HP, while still delivering good bottom-end power. And they're great for max flow on large singles or compound turbo setups.
|
Duration @ .050 |
Cam Lift |
Lope Sep. |
| Intake |
189 degrees |
.306 |
107 |
| Exhaust |
218 degrees |
.323 |
|
Part Number: C.322.S
Features
- Average 2 – 3 MPG increase
- 30 – 35 % smoke decrease
- Approximately 200° EGT drop
- Good to 4700 RPM
- Similar to the stage 3 but runs a larger exhaust profile
- Thicker core and fillet radiuses in front of both journals on #1 cyl - This strengthens cam for less chance of breakage
- Colt Cams heat treats them in a very unique way again for less chance of breakage and lobe scuffing
- All the cams are parkerized. This is for the initial start-up, break in procedure. Parco lubrite is a graphite coating done in a hot acid bath. This allows your cam lube something to hang on to and puts a barrier between your tappets and lobe so no hot spots can occur from metal on metal. This is another important detail for longevity.
Notes
- Colt Cams Tappet Set is highly recommended
- NOT recommended for towing
- Valve clearance may be required - 1800-4700 rpm.
- Retainer torque 44 ft lbs – use red loctite.
- Due to many contributing variances in an engine: heads planed, block decked, valve recession etc... any cam including stock, should always be checked for clearance before start up!
