PRC Stage 2.5 LS1 CNC Ported Heads

The price listed is for you sending your cathedral port LS6 cylinder heads to us for porting. Stage 2.5 includes aftermarket 2.02/1.57 stainless steel valves. We also offer valve spring upgrades.

PRC CNC Porting/Machining Service Includes:

• Disassembly
• Deep Cleaning
• CNC Porting
• CNC Valve Job
• CNC Engraving of PRC Logos
• CNC Milling to Your Specs
• Reassembly
• Pressure Testing

With all PRC cylinder heads, quality and performance are our two highest priorities! In addition to this, you will not find a better performing cylinder head porting service at this price. Call one of our sales consultants today if you have any questions or if you would like to discuss your specific application.

Stage 2.5 LS6 Flow Chart
Lift	Intake Flow		Exhaust Flow
.200″	147 cfm		114 cfm
.300″	209 cfm		152 cfm
.400″	258 cfm		191 cfm
.500″	294 cfm		207 cfm
.600″	316 cfm		226 cfm