Internal General Motors documents have revealed new details about a future Corvette powertrain. According to Corvette Blogger, it is the LS6 from the new sixth-generation Small Block V8 family, intended for the 2027 Corvette Grand Sport.

The source is GM’s internal Parts Book used by the company’s technical specialists, a resource that has repeatedly flagged upcoming products well before official announcements. The new entry lists a 6.7-liter gasoline V8 with an aluminum block, an OHV layout, and a combination of direct and port fuel injection. That hardware mix reads as a measured, real-world setup rather than a bid for novelty.

Earlier information indicated the Gen 6 Small Block lineup would include 5.7- and 6.6-liter versions. The appearance of a 6.7-liter variant points to an expanded range and the preparation of a more performance-oriented specification for sports models. Exact power and torque figures are not yet disclosed.

Notably, the LS6 appears in listings for the 2027 model year, signaling an advanced stage of production planning. The new engine could play a pivotal role in the Corvette lineup and influence the 2027 sports-car segment, where GM continues to back traditional V8s. The trajectory suggests a focus on refining a proven formula without losing the character that defines the nameplate.