GM details Corvette's new and mighty LT6 V8

If the end of the internal-combustion epoch truly is within sight, General Motors intends to see it out with a bang. It's latest - who's to say whether it's the “last?” - clean-sheet V8, internally designated LT6, arguably is its best, considering GM touts it as the world's most-powerful normally-aspirated V8 ever fitted in a production vehicle.

Earmarked for the 2023 Z06 high-performance variant of the Chevrolet Corvette, the LT6's most-illustrious design feature is its flat-plane crankshaft, but engineers in mid-February 2021 laid out for media the numerous other unique engineering elements that led to the thunderous SAE-certified output of 670 hp and from a comparatively moderate - in V8 terms - displacement of 5.5L. Over its eight-year development that saw the first prototype in 2015, engineers from GM's Small Block engine team dubbed the engine “Gemini” due to its many “twin” architectural elements.