Cummins 5.9L 12 Valve Stage 2 Ported & Polised Cylinder Head W/ Fire Ring Groove

air flow is only one of the things to think about. Another major concern is port wall thickness. Anyone can get a head to produce high flow numbers, but if doing so leaves the port wall to thin the casting will crack. High performance Diesel heads are more prone to crack because of the thermal shock experienced by excessive intermittent or long term exhaust temperatures. The porting is then preformed using a new 5 Axis CNC Cylinder Head Porting Machine with CAD/CAM software specifically designed for cylinder head porting. CNC porting brings unparalleled accuracy to head porting with each port flowing the same. This helps balance the power that each cylinder produces, making tuning easier. New High Strength Alloy, Heat Treated iron based valve guides are installed. These guides are heat treated to Rockwell 22 Scale, which produces the ultimate in wear resistance. This is far superior to original guide material, including Bronze. The guide incorporates a spiral grove inside the guide to hold oil and aid the lubrication of the valve during engine operation.

• CNC Ported Cylinder Head (Milled off intake runner to accept ZZ Fab intake) sold separately
• New Stainless Steel Valves
• High Strength Alloy Valve Guides
• Drilled & Tapped Coolant Freeze Plugs In Head
• Fire Ringed Head
• Industrial Injection 150lb Valve Springs

Attributes:

• Brand Name: Industrial Injection
• GTIN: 00840256913897

Extended Information:

• Country of Origin: US
• Emissions : EPA Eligible

Packing Information:

• Quantity of Each: 1
• Package UOM: EA
• Dimension: 36 x 36 x 15 inches
• Weight: 200 POUNDS