GM Performance Parts ZZ4 Power Packages

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The ZZ4 brings you a few more upgrades right from the factory. They include aluminum heads, an upgraded camshaft, and aluminum dual-plane intake manifold. Still, there are improvements in power that can be made with the ZZ4 as we found out on the GM Performance Parts Engine Dyno Configurator. Here's a sample of what a few component upgrades can do for the timeless ZZ4