By Shawn Henry 
Chevrolet appears poised to further expand the Corvette lineup with a new Grand Sport model expected to arrive for the 2027 model year, and fresh details suggest it will feature an even larger V8 engine than previously believed.
According to recent reporting, the upcoming Grand Sport will use a sixth-generation LS6 engine with a displacement of 6.7 liters. Earlier speculation pointed to a 5.7-liter or 6.6-liter configuration, but new information indicates the engine will be larger, continuing Chevrolet’s push toward high-output naturally aspirated performance.
The source of the leak traces back to the GM Parts Book, which has previously revealed accurate details about future Corvette powertrains. The same individual who identified the C8 ZR1’s LT7 engine code reportedly uncovered a new regular production option listing tied to the 2027 model year. That listing describes the LS6 as an eight-cylinder aluminum overhead-valve gasoline engine featuring both direct injection and port fuel injection.
The appearance of the code under 2027 model year data suggests the new Grand Sport could debut sometime in 2026. The information was later corroborated by a person described as being close to General Motors, lending additional credibility to the 6.7-liter figure.
The engine is believed to be part of General Motors’ broader investment in new internal combustion engines announced earlier this year. With GM signaling increased output from these future powerplants, the new LS6 is expected to deliver more than 500 horsepower, placing it well above the current 6.2-liter LT2 used in the Stingray.
As with past Grand Sport models, the new version is expected to feature a wider body than the standard Stingray, helping bridge the gap between base and track-focused variants. Where it fits in the Corvette lineup remains unclear. The LS6 could theoretically replace the LT2 in the Stingray, but the cost of developing a new engine may push it into a higher price bracket.
Another possibility is that the Grand Sport could take the place of the E-Ray, which accounted for a small share of Corvette sales last year and has shown weaker resale performance. Pricing is expected to land between the Stingray and E-Ray, potentially in the $85,000 to $100,000 range.
While many details remain unconfirmed, the engine listing represents the strongest evidence yet that a new Corvette Grand Sport is on the way, with more information expected to emerge through early 2026.
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