LS1 PRC STAGE 2.5 5.3L CNC PORTED HEADS - OUTRIGHT
Description:
PRC Stage 2.5 5.3L Cylinder Heads come standard with:
2.02"/1.575" Stainless Steel Valves
Full CNC Porting and Machining
CNC Milling to Your Specifications Available
58-63cc configurations
Valve Spring Options:
No Springs
PAC 1218 Beehive Springs w/ GM Retainers, Seats & Seals
PAC .660" Lift Dual Spring w/ PRC Titanium retainers, Seats & Seals - Recommended
* The price listed is for the pair using seasoned castings. This is an outright purchase with no exchange of castings necessary.
All PRC cylinder heads are extensively researched and tested. The flow data below shows the superior performance of the PRC stage 2.5 5.3 cylinder heads!
3.910" Flow Plate - No Exhaust Pipe
2.02"/1.575" Stainless Steel Valves
Full CNC Porting and Machining
CNC Milling to Your Specifications Available
58-63cc configurations
Valve Spring Options:
No Springs
PAC 1218 Beehive Springs w/ GM Retainers, Seats & Seals
PAC .660" Lift Dual Spring w/ PRC Titanium retainers, Seats & Seals - Recommended
* The price listed is for the pair using seasoned castings. This is an outright purchase with no exchange of castings necessary.
All PRC cylinder heads are extensively researched and tested. The flow data below shows the superior performance of the PRC stage 2.5 5.3 cylinder heads!
3.910" Flow Plate - No Exhaust Pipe
| Lift |
Intake Flow |
Exhaust Flow |
|
.200" |
147 cfm |
111 cfm |
|
.300" |
206 cfm |
145 cfm |
|
.400" |
254 cfm |
185 cfm |
|
.500" |
291 cfm |
204 cfm |
|
.600" |
308 cfm |
223 cfm |
