Unless you've been living under a rock, we're sure you've heard about GM's LS series of engines. When first introduced back in the late '90s, these all-aluminum mills set the Chevy performance world on end and since then it's only gotten better. The 346-inch LS1 begat the 364-cube LS2, which later gave way to the LS3, which displaces 374 ci. The growth spurt came to an end, at least for now, with the 427ci LS7. Sure there were/are other LS-based engines out there stuffed in many of GM's offerings, but none exceed the displacement of the LS7 developed for the Corvette Z06.