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GM Parts Catalog Leak Confirms the C8 ZR1’s LT7 is a 5.5L Turbo V8 with VVT and AFM Technologies
An internal GM Parts catalog that brings to light more info about the engine that will power the upcoming 2025 Corvette ZR1.
The belief that the ZR1 is LT7 turbocharged, but then that opened the debate whether or not the car would feature a flat-plane crank like the Z06’s LT6, or would it utilize a cross-plane crank which lowers the RPM range but may also offer greater reliability with reduction of the FPC vibrations while being able to add Variable Valve Timing (VVT) and Active Fuel Management (AFM) technology
The GM Parts Catalog leak shows several different parts numbers & descriptions, and we even have a one of the parts photos included. In addition to the part number and description, there is an “application type” showing which engine these parts are for, and it’s described as “YR 5.5L-(LT7).”
Detailing the LT7 as “ENGINE GAS, 8 CYL, 5.5L, DI, VVT, AFM, SC TURBO, DOHC” which helps to bring the motor into focus as it includes direct injection, variable valve timing, & active fuel management offered on the dual overhead cam motor.
As the LT6 doesn’t offer VVT or AFM, that could be due to the LT7 having the cross-plane crank vs the higher-revving flat-plane crank found in the LT6.
The application includes “YR07-67 5.5L LT7 8-SPEED TRANS (M1K) Customer Engine Build Program (PBC),” which appears to reference the Engine Build option code for customers to build their own LT7s.
While the Engine Build option was initially talked about with the Z06’s LT6, it never came to pass due to the complexity of the motor and the demands on the Performance Build Center that it would have caused.
Debate on whether to bring the ZR1 to market as a 2025 or a 2026, and so far as of now, it’s on track to debut as the 2025 Corvette ZR1.
The new LT7 is expected to land with between 800–850 horsepower, and speculating that the ZR1’s MSRP will be somewhere in the $140s
An internal GM Parts catalog that brings to light more info about the engine that will power the upcoming 2025 Corvette ZR1.
The belief that the ZR1 is LT7 turbocharged, but then that opened the debate whether or not the car would feature a flat-plane crank like the Z06’s LT6, or would it utilize a cross-plane crank which lowers the RPM range but may also offer greater reliability with reduction of the FPC vibrations while being able to add Variable Valve Timing (VVT) and Active Fuel Management (AFM) technology
The GM Parts Catalog leak shows several different parts numbers & descriptions, and we even have a one of the parts photos included. In addition to the part number and description, there is an “application type” showing which engine these parts are for, and it’s described as “YR 5.5L-(LT7).”
Detailing the LT7 as “ENGINE GAS, 8 CYL, 5.5L, DI, VVT, AFM, SC TURBO, DOHC” which helps to bring the motor into focus as it includes direct injection, variable valve timing, & active fuel management offered on the dual overhead cam motor.
As the LT6 doesn’t offer VVT or AFM, that could be due to the LT7 having the cross-plane crank vs the higher-revving flat-plane crank found in the LT6.
The application includes “YR07-67 5.5L LT7 8-SPEED TRANS (M1K) Customer Engine Build Program (PBC),” which appears to reference the Engine Build option code for customers to build their own LT7s.
While the Engine Build option was initially talked about with the Z06’s LT6, it never came to pass due to the complexity of the motor and the demands on the Performance Build Center that it would have caused.
Debate on whether to bring the ZR1 to market as a 2025 or a 2026, and so far as of now, it’s on track to debut as the 2025 Corvette ZR1.
The new LT7 is expected to land with between 800–850 horsepower, and speculating that the ZR1’s MSRP will be somewhere in the $140s