PRC Stage 2.5 LQ9 CNC Ported Heads

All Precision Race Components (PRC) cylinder heads come fully CNC-ported and machined using state-of-the-art technology.
PRC’s stage 2.5 6.0L Cylinder Heads come standard with the following options:

NEW GM 317 Cores

2.02″/1.575″ Stainless Steel Valves

TSP .660″ Lift Dual Valve Spring Kit w/ PAC Valve Springs Complete with Retainers, Seats, & Seals

Completely Assembled and Milled to your Specifications

65-72cc Chambers

All PRC cylinder heads are extensively researched and tested. The flow data below shows the superior performance of the PRC stage 2.5 6.0L cylinder heads!

3.910″ Flow Plate – No Exhaust Pipe

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