PRC LS3 As-Cast Aftermarket Heads, 68cc, TSP .660" Dual Spring Kit w/ Ti Retainers
PRECISION RACE COMPONENTS
Click Here to SEE why we build better heads!
MADE IN THE USA!!
CAST IN THE USA!!
MACHINED IN THE USA!!
- As-Cast 257cc Intake Runners With CNC Machined Chambers & Valve Guides For Unmatched Flow!
- 68cc CNC Machined Chambers
- Thicker Deck Surface Makes Them Ideal For Power-Adder Applications
- Relocated valves with 13° Valve Angles
- 2.170" Hollow Stem Stainless Intake Valves / 1.600" Stainless Exhaust Valves
- Utilizes Factory Rocker Arms
- TSP .660 Spring Kit w/ PAC Valve Springs & Titanium Retainers
The all new PRC LS3 As-Cast cylinder heads are now available for customers looking for the ultimate as-cast LS3 cylinder heads available. Â The new PRC as-cast intake port has been flow bench tested to flow 369 CFM & can support everything from smaller camshaft street engines all the way to all out race engines.
Flow Data (4.00" Flow Plate - No Exhaust Pipe):
| LIFT | INTAKE FLOWÂ | EXHAUST FLOWÂ |
| Â | Â | |
| Â .200" Â | Â 153 CFM | Â 114 CFM |
| Â .300" Â | Â 233 CFM | Â 163 CFM |
| Â .400" Â | Â 287 CFM | Â 191 CFM |
| Â .500" Â | Â 329 CFM | Â 214 CFM |
| Â .600" Â | Â 357 CFM | Â 228 CFM |
| Â .650" Â | Â 369 CFM | Â 233 CFM |