PRC LS3 Aftermarket. As-Cast Cylinder Heads

  • Precision Race Components all new LS3 as-cast cylinder heads completed with CNC machined chambers & valve guides. For  LS3/L99/L92/LSA/LS9 applications requiring a high flow aftermarket cylinder head at a competitive price!
    • As-Cast 257cc Intake Runners With CNC Machined Chambers & Valve Guides For Unmatched Flow!
    • 68cc CNC Machined Chambers as Standard; Can Be Milled Down to 64cc Chambers & Still Retain Better than Factory Piston-to-Valve Clearance
    • Thicker Deck Surface Makes Them Ideal For Power-Adder Applications
    • 2.170″ Hollow Stem Stainless Intake Valves / 1.600″ Stainless Exhaust Valves
    • Utilizes Factory Rocker Arms
    • Optional TSP Spring Kit w/ PAC Valve Springs & Titanium Retainers
    •  Available with Hollow-Stem Intake Valves to Reduce Valvetrain Weight

    Flow Data (4.00″ Flow Plate – No Exhaust Pipe):

    Price Is For 2 Cylinder Heads – Ships direct from PRC, ETA 2-3 weeks

    Cylinder Heads Come Assembled as optioned.



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The all new PRC LS3 As-Cast cylinder heads are now available for customers looking for the ultimate as-cast LS3 cylinder heads available. 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. The cylinder heads will come standard with 68cc chambers. We can mill them as small as 64cc while still retaining better than factory piston-to-valve clearance! We can mill additionally to get to your desired chamber size for no additional charge! 199-ssprcls3ascast 199-ssprcls3ascast

Precision’s main office and manufacturing facilities are located about 70 miles south east of Nashville. We have been in business since 1994. Our state of the art machine shop is equipped with top of the line equipment for engine rebuilding. We also machine for OEM & Performance Diesel applications. We have a line of CNC’s and specialize in cylinder head porting & custom billet engine parts such as diesel heads & connecting rods. 199-ssprcls3ascast


Bare (no valve springs), Assembled (.660 PAC spring kit), Assembled (.750 PAC spring kit)


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This product fits the following vehicles

Item may also fit vehicles not listed below.

Year Make Model Engine
Year Make Model Engine
2005 - 2013 Chevy Corvette All
2008 - 2009 Pontiac G8 6.0/6.2
2009 - 2014 Cadillac CTS-V 6.2L
2010 - 2015 Chevy Camaro 6.2L
2014 - 2017 Chevy SS 6.2L LS3

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