275cc 11° CNC LS3 Cylinder Heads - Out of Stock
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275cc 11° CNC LS3 Cylinder Heads - Out of Stock

$2,295.00
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100% Fully CNC Ported 275cc Intake, 100cc Exhaust & 69cc Chambers Virgin A356 Aluminum Castings 6 Bolt Head Casting with Extra Strength Decks Advanced 11° Valve Angle for Maximum Flow & PTV Clearance 2.165” Intake Valve 21-4N Alloy & 1.60” Exhaust Valve 23-8N Super Alloy 0.210" Intake Free Drop & 0.250" Exhaust Free Drop 23-8N Alloy has the same high temp characteristics of “Inconel” w/o the brittleness Available Complete w/ Chromoly Retainers, Ti Retainers, or Bare w/ Valves Billet Rocker Arm Stands Included - Compatible w/ OEM LS3 Rocker Arms Compatible w/ 4 Bolt OEM Engine Blocks - 4.000" Minimum Bore Required Price is for a Complete Set 0.660" Spring Specs: 145# @ 1.800" 400# @ 1.130" CB @ 1.070" 0.700" Spring Specs: 170# @ 1.800" 450# @ 1.115" CB @ 1.000" Valve Lift Intake Exhaust 0.200" 135 110 0.300" 210 145 0.400" 264 174 0.500" 325 197 0.600" 348 216 0.700" 366 228 Head Flow Data @ 28inHg, 4.125" Bore, Intake w/ Radius, Exhaust w/o

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