We take the Vortec big-block from this 1996 Chevy truck dually to Superior Automotive to have the heads flowed and ported and more, only on sporttruck.com, the official website of Sport Truck ...

For this episode ofEngine Masters, presented by AMSOIL, we grabbed a set of as-cast Chevy Vortec heads, 906 castings in this example.The stock 170cc ports were left untouched, along with the 64cc ...

Since even mild performance cams stretch the valve-lift envelope into the 0.500-inch range, the Vortec heads require modifications to the valveguide to allow more lift and new springs.

GM produced the LQ4 and LQ9 engines. We explore their differences, where they were manufactured, and what vehicles they were used in.