« Designed to deliver the most power and torque with Vortec cylinder
head P/N 12529093, P/N 12558060, P/N 12497186, P/N 12464298,
P/N 25534421 or P/N 25534446
« Use intake manifold gasket kit P/N 19301685 and 8 special manifold
bolts P/N 12550027