This kit upgrades every part of the 12-valve valvetrain. When you combine our best all-around performing camshaft with valve springs that control the valvetrain up to 4,500 RPM and 80 lbs. of boost, pushrods rated to well over 2,000 HP, and our 1.45 Inch tappets that provide more surface area, you have the best cam combination on the market for the 1989-1998 Dodge Cummins. If you're looking for the quickest spool and widest RPM band of all our cams, this is it.
It was initially designed for trucks that work hard and need instant torque in the low-RPM range. It was later found to greatly improve the spool-up of large single turbos, increase fuel economy, lower EGTs, maintain power at higher elevations, and retain significant horsepower and RPM potential. It is also 49-state EPA compliant.
If you think it is too small for your horsepower goals, think again. On our engine dyno, a 6.7L with a single S400 produced 1,100 HP with a stock head, 1,250 HP with a stock head and larger valves, and 1,588 HP at 4,500 RPM with a ported head.
What's Included:
- 178/208 Camshaft (fits 1989-2018 Cummins)
- Extreme Duty Pushrods (OEM - 2,000+ HP)
- 155 Valve Springs
- Retainers and Locks
- Lifters/Tappets
Details:
- Sold As: Kit
- Universal: No
- Vehicle Type: Truck
- Liter: 5.9L
- Fuel Type: Diesel
- Valve: 12-Valve
- Duration at .050 Inch: 178 Degree Intake / 208 Degree Exhaust
- RPM Range: Up to 4,500 RPM
- Valve Lash: .010 Inch Intake / .020 Inch Exhaust
- Seat Pressure: 155 lb
- Emissions Compliance: 49-State EPA Compliant - Not for Sale in California
Fitment Notes:
- Fitment: 1989-1998 Dodge Ram 5.9L Cummins 12-Valve engines.
- For this camshaft to be considered drop-in, you will need no more than .020 Inch piston protrusion and at least .055 Inch valve-face depth with a standard head gasket. If your engine does not meet the minimum piston-to-valve clearance requirements, you can still use an oversized head gasket or cut valve reliefs.
- Not for sale in the state of California
Installation Notes:
- Disconnect the fuel system and spin the engine with the starter until oil pressure is visible or oil is coming from the rocker arms on cylinder No. 6.
- Do not operate the starter for more than 10 seconds at a time.
- Once oil pressure has been verified, start the engine and allow it to run until it reaches operating temperature. Then shut the engine down.
- A hot re-torque is very important and will change the valve-lash settings. Always set the valve lash after completing the hot re-torque.
- Adjust the valves to .010 Inch intake and .020 Inch exhaust. You are then cleared to enjoy the added airflow.
- Two or three times each year, we receive calls from customers who notice the valve lash becoming loose on the last three cylinders. This is typically caused by poor lubrication during the initial startup. In these cases, the camshaft can wear into the block due to the force of the tappets.
- Assembly lubricant and verified oil pressure during the initial startup are extremely important. Do not allow this to happen to your engine.
- Approved oil is required.
- Use a 15W-40 oil, or a 5W-40 oil in sub-zero conditions, with adequate zinc, phosphorus, and molybdenum. Thin or low-additive oils do not provide the shear strength required by a flat-tappet valvetrain.
Approved Oils:
- Valvoline Full Synthetic 15W-40
- Valvoline Synthetic Blend 15W-40
- Valvoline All-Terrain 15W-40
- Schaeffer's 15W-40
- Mobil Delvac Extreme 15W-40
- Liqui Moly Touring High Tech 15W-40
- Driven Racing Oil 15W-40
- Shell Rotella T6 Full Synthetic 15W-40
- Shell Rotella 15W-40