Bundles for the 2006–2007 Duramax 6.6L LBZ group key engine parts into one kit. They save time and money. Most include head gaskets, head studs, valve cover gaskets, injector seals, and intake gaskets.

Performance bundles may add ARP studs, MLS gaskets, and other heavy-duty parts. These handle more boost and power. Bundles are great for rebuilds, gasket jobs, or upgrades. They make sure all parts fit and are ready to install.