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.