The Gen III engine has proven itself to be quite a performer since its inception in 1997. In its most potent LS6 variant, it reached 405 hp thanks to improvements in cylinder head design and a lumpier ...

GM's Gen III V-8 ain't your old man's small-block Chevy, and maybe that's not such a bad thing after all. For everything the original Bow Tie Mouse accomplished since its 1955 inception-from weaning ...

In the market for a huge power increase? Then you're probably looking at getting a set of ported aluminum heads on your GM car or truck. Here's a sampling of what's available from the aftermarket ...