Details
For all cylinder head orders expect build time to be 4-6 weeks.
PRC CNC Porting Service - Cathedral Port Heads (Customer Supplied Castings) - PRR-199-CathedralPorting
The price listed is for you sending your cathedral port cylinder heads (4.8/5.3, LS1, LS6, LS2, LQ4/9) to us for porting. Our stage 1 porting service will include the re-use of the stock vales. Stage 2.5 will include 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 5.3L Flow Chart
Lift Intake Flow
Exhaust Flow
.200" 147 cfm
111 cfm
.300" 207 cfm
145 cfm
.400" 254 cfm
185 cfm
.500" 291 cfm
204 cfm
.600" 308 cfm
223 cfm
Stage 1.0 LS6 Flow Chart
Lift Intake Flow
Exhaust Flow
.200" 147 cfm
114 cfm
.300" 207 cfm
148 cfm
.400" 255 cfm
187 cfm
.500" 292 cfm
202 cfm
.600" 313 cfm
220 cfm
Stage 2.5 LS6 Flow Chart
Lift Intake Flow
Exhaust Flow
.200" 147 cfm
114 cfm
.300" 207 cfm
152 cfm
.400" 255 cfm
191 cfm
.500" 292 cfm
207 cfm
.600" 316 cfm
226 cfm
Stage 1.0 LQ9 Flow Chart
Lift Intake Flow
Exhaust Flow
.200" 147 cfm
114 cfm
.300" 207 cfm
148 cfm
.400" 255 cfm
187 cfm
.500" 292 cfm
202 cfm
.600" 313 cfm
220 cfm
Stage 2.5 LQ9 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
*Typically a 1-2 week turn around time once heads arrive at our facility.
*Stage 1 porting NOT available for 4.8L and 5.3L castings due to the factory 1.94" intake valve size. All 4.8L and 5.3L cylinder heads must select the stage 2.5 option that includes 2.02"/1.57" stainless steel valves!
Lethal Performance is proud to offer the entire line of products!
