No Replacement for Displacement: The 2027 Corvette’s LS6 Is the Most Torque-Rich Naturally Aspirated V8 Ever Built

A few days ago, Chevrolet debuted the 6th generation of its acclaimed small block V8 as a 6.7-liter “LS6” engine powering the 2027 Corvette Stingray, Grand Sport, and Grand Sport X. The new iteration of Chevy’s small-block engine is the most powerful base engine ever offered in a Corvette, with the highest torque of any naturally aspirated production V8 ever.

To put this in perspective, with 520 lb-ft of torque on tap, the LS6 slots ahead of every naturally aspirated V8 GM has ever made, including the 7.0L LS7, which produces 481 lb-ft, the LT2 with its 470 lb-ft, and even the heavy-duty 6.6L L8T with 464 lb-ft. But what does this new LS6 engine mean for the Corvette? How does Chevrolet plan to carry it over into the C9 generation of the Vette, and is this a reaffirmation that V8s are not going anywhere?

A Name With Some History Behind It

More than 100 million small block V8s have been built since the original 265-cubic-inch unit rolled out of Flint, Michigan on July 9, 1954. Six generations in 72 years. By any measure, it’s one of the most significant engine families in automotive history, and the latest chapter just happened to break a record nobody else was chasing.

“LS6” isn’t a new name. It first belonged to a 454-cubic-inch big block in the early 1970s, then resurfaced on the 5.7-liter V8 that powered the C5 Z06 and the original Cadillac CTS-V. Dusting it off for the sixth-generation small block is a deliberate callback, both to the generational milestone and to a short list of GM engines that genuinely earned their reputation. One more thing: 6.7 liters converts to almost exactly 409 cubic inches. Same number as the big block Chevy was advertising in 1962. Whether that’s coincidence or not, nobody at GM is denying it. Assembly returns to Flint, where the whole story started.