How fast are the new monte carol ss with the 303hp 5.3Lt V8? It says that the small block V8 cylinder heads were originally developed for the Corvette Z06. Their pent–roof combustion chambers and flat–top pistons deliver high horsepower. The composite intake manifold design allows the small block V8 to deliver high levels of torque at low– and mid–range engine speeds, while still delivering plenty of air flow for peak engine horsepower.