PRC As-Cast 225cc LS1/LS2 Cathedral Heads 5.7 LS1/ LS2 6.0

Precision Race Components all new as-cast cylinder heads completed with CNC machined chambers & valve guides. For  LS1/LS2 applications requiring a high flow aftermarket cylinder head at a unbelievable price! As-Cast 225cc Intake Runners With CNC Machined Chambers & Valve Guides For Unmatched Flow! Large Bore Configurations for customers looking for bigger bores such as stroker or boost applications 68cc CNC Machined Chambers 2.065" Hollow Stem Intake / 1.600" Stainless Exhaust Valves Utilizes Factory LS1 Rocker Arms TSP .750" high rev spring kit with titanium retainers, spring seats, valve seals The all new PRC 225cc As-Cast cylinder heads are finally available for customers looking for the ultimate as-cast cathedral LS heads available.  The new PRC as-cast intake port has been flow bench tested to flow over 320cfm & can support everything from smaller camshaft street engines all the way to all out race engines. This cylinder head is a combination of a max-effort, high-flowing port combined with a smaller chamber designed for max power in stock cube applications. Flow Data (4.00" Flow Plate - No Exhaust Pipe):   LIFT INTAKE FLOW  EXHAUST FLOW   .100"   68 CFM  56 CFM   .200"    145 CFM  113 CFM  .300"    210 CFM  164 CFM  .400"    257 CFM  200 CFM  .500"    300 CFM  214 CFM  .600"    318 CFM  229 CFM  .650"    321 CFM  230 CFM