General Motors' LS series engines have been around since 1997, and have one key design feature that enables upgrades that significantly boost horsepower.

Stock Junkyard LS. Richard Holdener Holdener took a stock, flat-top 5.3-liter LS and put it on an engine dyno to find a baseline power rating.

The LS family of engines was introduced in 1997 and has been used in all Corvettes built since. But installing the right combination of parts to enhance the performance of this sophisticated ...