PRC LS3 As-Cast Aftermarket Heads, 68cc, TSP .660″ Dual Spring Kit w/ Ti Retainers

PRC LS3 As-Cast Aftermarket Heads, 68cc, TSP .660″ Dual Spring Kit w/ Ti Retainers

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!

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MADE IN THE USA!!
CAST IN THE USA!!
MACHINED IN THE USA!!

Features:

• 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. 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):

• .200″ Lift: Intake Flow 153 CFM / Exhaust Flow 114 CFM
• .300″ Lift: Intake Flow 233 CFM / Exhaust Flow 163 CFM
• .400″ Lift: Intake Flow 287 CFM / Exhaust Flow 191 CFM
• .500″ Lift: Intake Flow 329 CFM / Exhaust Flow 214 CFM
• .600″ Lift: Intake Flow 357 CFM / Exhaust Flow 228 CFM
• .650″ Lift: Intake Flow 369 CFM / Exhaust Flow 233 CFM