CNC port work on your Cummins 5.9 – 12 valve head. 

Stage 1 –  $850.00   -  Stage 1 with intake manifold.

Stage 2  – $1050.00 – Stage 2 with intake milled off.

Mill off intake manifold – $200.00

Drill and tap for new manifold - $225.00

	Intake	Exhaust	Lift	Percent of Gain Intake	Percent of Gain Exhaust
Stock	140	161	.550	-	-
Stage 1	185	207	.600	31%	28%
Stage 2

 

 

                                                                                                                                                                                                                                                                                                                                                                                                                                                                    *Flow Bench work was performed by Visner Engine Development using their SF-600 flow bench