CNC port work on your Cummins 5.9 – 24 valve head

Stage 1 –  $1150.00  - Stage 1 with intake manifold

Stage 2 -  $1350.00 – Stage 2 with intake milled off

Mill off intake manifold – $200.00

Drill and tap for new manifold - $225.00

CR Head      Intake    Exhaust Lift Percent of Gain Intake Percent of Gain Exhaust Stock      190      190 .600             -             - Stage 1      190      223 .600             -          17% Stage 2      232      223 .600           22%          17%

 

 

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

 

                                                 

VP Head	Intake	Exhaust	Lift	Percent of Gain Intake	Percent of Gain Exhaust
Stock	158	178	.550	-	-
Stage 1	191	235	.550	21%	32%
Stage 2	199	235	.550	26%	32%