Vortec Cylinder Heads

Vortec Cylinder Heads
An easy way to gain 20-40 horsepower on any 1955-and-newer Small-Block
Chevrolet V-8 (except later-style LT1/LT4 engines with reverse-flow cooling)
is by installing a set of Vortec cylinder heads. These value-priced cast-iron
cylinder heads use modified combustion chambers and high velocity port
technology to provide improved performance. Vortec cylinder heads significantly
outflow non-Vortec service replacement cylinder heads and earlier
OEM cast-iron heads. These cylinder heads are ideal for applications up to
350 horsepower, but they require Vortec-specific intake manifolds.