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 ...

If you're a company that makes aftermarket cylinder heads for Detroit's most recent powerhouses, you've found yourself in a bit of a pickle in recent years, as mass flow rates for ordinary ...

If you've been reading GMHTP lately, you know that the new L92 heads are superior to stock LS1 and LS2 heads. But what happens when you put them to task against one of the best 15-degree heads on the ...