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Chevrolet Performance Small Block Chevy Large Port Vortec Cylinder Heads
Small Block Chevy Bow Tie Large Port Cast Iron Vortec Cylinder Heads are Chevrolet Performance's most powerful cast iron cylinder head designed for street or race applications in the 400-450 horsepower range. As upgraded production heads, they have a thicker deck surface, large runners, bigger valves, and combustion chambers with exceptional low-lift flow numbers. These cylinder heads provide Chevy's Fast Burn performance in an affordable cast iron option.
No heat risers
Intake Ports: 225cc
Exhaust Ports: 77cc
Combustion Chambers: 65cc
Improved airflow (281 cfm at .600'')
Deck Thickness: .450''
Hardened exhaust valve seats
Machined for 2.00''/1.55'' valves
Popular in short track racing
Drilled & tapped for 7/16''-14 screw-in studs
.530'' maximum valve lift without modification
Cast Logos: Vortec (intake port roof), GM (intake port floor), Bow Tie (exhaust side)
Dual bolt patterns for: perimeter and centerbolt valve covers & early model and Vortec intake manifolds
JEGS Easy Kits are designed by JEGS professionals so you get all the parts you need.