Description
Description
Fits
| Year | Make | Model |
| 1989-2018 | Dodge Ram HD | 6.7L & 4BT Cummins |
These Stage 4 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 | Valve Lift | Lope Sep. | |
| Intake | 181 degrees | .280 | .490 | 107.5 |
| Exhaust | 218 degrees | .323 | .565 |
Part Number: C.346.S
Features
- Average 2 – 3 MPG increase
- 30 – 35 % smoke decrease
- Approximately 200° EGT drop
- Good to 4400 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
- 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!
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