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GM Performance Parts cast-iron L31 Vortec small-block head.
Part Number: 8809N
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GM Performance Parts cast-iron L31 Vortec small-block head.
This head features fast-burn combustion chambers and high-velocity ports. It can be mildly ported and milled up to 0.040" for increased compression. Includes valves, springs, and presssed-in 3/8" studs. Sold individually.
Chamber size: 64cc
Valve sizes: 1.94" intake, 1.50" exhaust (valves included).NOTE: This head has the Vortec-style 8-hole intake bolt pattern and will not fit standard 1955-86 intake manifolds. Early-design intake manifolds will not match up even when
Valve sizes: 1.94" intake, 1.50" exhaust (valves included).NOTE: This head has the Vortec-style 8-hole intake bolt pattern and will not fit standard 1955-86 intake manifolds. Early-design intake manifolds will not match up even when

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