The 5.5L flat-plane crank V8 engine that powers the 2023-2026 Corvette Z06 generates 670 horsepower. Add the twin turbos on the 2025-2026 Corvette ZR1 and the engine produces 1,064 horsepower — making it the most powerful engine ever offered in a production Corvette. (Fig. 10)
Fig. 10
As part of GM’s commitment to continuous improvement, the 5.5L engine (RPO LT6) in the Corvette Z06 and the 5.5L engine (RPO LT7) in the Corvette ZR1 have been placed on a part restriction.
When diagnosing possible engine failure, refer to #PIP6089 and gather the required information before contacting the Technical Assistance Center (TAC).
The engine part number will need to be provided to TAC. It can be found in the center of the front cover. (Fig. 11, #1)
Fig. 11
For more information, refer to #PIP6089.
– Thanks to Bryan Salisbury
