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PRC 237cc CNC Ported Cylinder Heads
Regular price $2,584.99 Save $-2,584.99
Precision Race Components all new cylinder head castings completed with 237cc runners. For 370 cubic inch and larger applications with 4.00"+ bore sizing.
Click Here to SEE why we build better heads!
Click Here to SEE why we build better heads!
MADE IN THE USA!!
CAST IN THE USA!!
MACHINED IN THE USA!!
Features:
- 237cc Fully CNC Ported Intake Runners
- 84cc Fully CNC Ported Exhaust Runners
- TSP Dual Spring Kit w/ PAC Springs Rated To .660" Lift
- 68cc CNC Machined Chambers(call for different chamber size)
- CHE Bronze Guides
- 2.100" Intake / 1.600" Stainless Valves
- Factory Rocker Friendly!!
- ***NOW AVAILABLE WITH HOLLOW STEM INTAKE VALVES!!! SAVES APPROXIMATELY 15 Grams!!!***
Flow Data:
4.030" Flow Plate - No Exhaust Pipe
LIFT | INTAKE FLOW | EXHAUST FLOW |
.100" | 66 CFM | 57 CFM |
.200" | 147 CFM | 117 CFM |
.300" | 225 CFM | 170 CFM |
.400" | 284 CFM | 206 CFM |
.500" | 325 CFM | 227 CFM |
.600" | 334 CFM | 235 CFM |
.650" | 339 CFM | 241 CFM |

PRC 227cc CNC Ported Small Bore 3.9"-4" Cylinder Heads
Regular price $2,384.99 Save $-2,384.99Precision Race Components all new cylinder head castings completed with 227cc runners. For stock cubic inch LS1/LS2 applications requiring smaller chambers for extra compression
Click Here to SEE why we build better heads!
MADE IN THE USA!!
CAST IN THE USA!!
MACHINED IN THE USA!!
Features:
- 227cc Fully CNC Ported Intake Runners
- 84cc Fully CNC Ported Exhaust Runners
- Small Bore Chambers For Increased Horsepower & Torque+ SPECIFICALLY DESIGNED FOR 3.9"-4" BORE APPLICATIONS
- TSP Spring Kit w/ PAC Valve Springs Rated To .660" Lift
- 62cc CNC Machined Chambers(call for smaller CC)
- CHE Bronze Guides
- 2.065" Intake / 1.600" Stainless Valves ***NOW AVAILABLE WITH HOLLOW STEM INTAKE VALVES!!!***
- Factory Rocker Friendly!!*
This cylinder head was used on the Texas Speed 98 Camaro when it lowered the heads cam stock bottom end 1/4 mile record to 9.66!!
4.00" Flow Plate - No Exhaust Pipe
LIFT | INTAKE FLOW | EXHAUST FLOW |
.100" | 68 CFM | 56 CFM |
.200" | 145 CFM | 115 CFM |
.300" | 214 CFM | 167 CFM |
.400" | 261 CFM | 202 CFM |
.500" | 300 CFM | 219 CFM |
.600" | 322 CFM | 238 CFM |
.650" | 330 CFM | 236 CFM |

PRC 220cc 15-Degree CNC Cathedral Heads
Regular price $2,049.99 Save $-2,049.99Precision Race Components all new cylinder head castings completed with 220cc runners. For stock cubic inch LS1/LS2 applications requiring a stock valve angle LS cylinder head with extra thick decks comparable to stock piston to valve.
Click Here to SEE why we build better heads!
MADE IN THE USA!!
CAST IN THE USA!!
MACHINED IN THE USA!!
Features:
- 220cc Fully CNC Ported Intake Runners
- 84cc Fully CNC Ported Exhaust Runners
- Designed as a bolt on cylinder head with minimal change to pushrod length
- TSP Spring Kit w/ PAC Valve Springs Rated To .660" Lift
- 64cc CNC Machined Chambers
- CHE Bronze Guides
- 2.045" Intake / 1.600" Stainless Valves
- Factory Rocker Friendly!!*
- Extra Thick Deck Surfaces For Power Adders
