The next chapter in the •ZZê
crate engine legacy
Building on the strength and power of the legendary ZZ4 Small-Block,
Chevrolet Performance engineers have upped the ante with a revised
cylinder head design, new valvetrain components and more to create
the all-new ZZ5 _ a 400-horsepower 350 with loads of low-end torque.
In fact, the new ZZ5 produces at least 300 lb.-ft. of torque by only 1,500
rpm, for a thrilling feeling of immediate performance.
The new, lightweight aluminum cylinder head casting is based on the
proven Fast Burn design, with large intake runners and 2.00/1.55-inch
valves. New beehive-style valve springs enable greater high-rpm
performance and durability, as the egg-shaped springs have less
reciprocating mass in motion, require less spring pressure for greater
valve control and handle valvetrain stresses more efficiently.