Use with 62mm or larger single turbos or larger twins. This cam works great in 12v and 24v street trucks with stock head flow or with a ported head and stock size valves. For Common rail street trucks with larger valves and full tilt porting may we suggest the 178-208 to retain best bottom end. The intake is cut on a 99 centerline, performance springs and pushrods are recommended. If you have had your head or block surfaced, you need to verify piston to valve clearance.
For it to be “drop in” on a 12v you will need no more than .025? piston protrusion and at least .055? valve face depth with a standard head gasket and a 99 intake centerline. On a 98 – 02 24v you will need no more than .025? piston protrusion and at least .038? valve face depth with a standard gasket. On an 03 and up, it needs .018?piston protrusion and at least .038? valve face depth with a standard gasket. If you do not meet the minimum requirements for piston to valve clearance, don’t worry, you can still run an oversize headgasket or cut valve reliefs.
This Cam works both for the 5.9L Cummins and the 6.7L Cummins.