GM LT6 V-8 Engine

The LT6 is a future eight-cylinder engine from General Motors.

Following is speculative and unconfirmed information about the future GM LT6 engine. This page is a continuous work-in-progress and will be updated on a regular basis as we await official details from General Motors.

If you notice any inaccuracies about the information provided, or have edits to suggest, please let us know here.

Currently, no official information is available about the LT6 engine. However, we have a sufficient amount of details that we have learned from insider sources.

Overview

Displacement: 5.5L (335 ci)
Aspiration: atmospheric
Cylinders: 8
Configuration: V-8, Dual Overhead Cam (DOHC), 32 valve
Electrification: none
Other features: flat-plane crankshaft

Specifications

We expect the GM LT6 engine to be naturally-aspirated, displacing 5.5 liters in a V-8, Dual Overhead Cam (DOHC) configuration while employing a flat-plane crankshaft. The LT6 is expected to make around 600 horsepower and between 480 and 550 pound-feet of torque.

Vehicle Applications

The GM LT6 engine will serve as the standard powerplant for the mid-engine Chevrolet Corvette C8 Z06. The track-focused mid-engine super car is expected to launch for the 2022 model year.

Model Year	Make	Model	Power (hp @ RPM)	Torque (lb-ft @ RPM)
2022	Chevrolet	Corvette C8 Z06	~600 @ TBD	~480-550 @ TBD

Engine Family

Despite its LT designation, the LT6 will have nothing in common with GM’s fifth-generation Small Block overhead valve (push-rod / OHV) engine family, which includes the following motors:

6.2L V-8 LT1 naturally-aspirated
6.2L V-8 LT4 supercharged
6.2L V-8 LT5 supercharged
EcoTec3 family:
- 6.2L V-8 L87 naturally-aspirated
- 6.2L V-8 L86 naturally-aspirated
- 5.3L V-8 L84 naturally-aspirated
- 5.3L V-8 L83 naturally-aspirated
- 5.3L V-8 L82 naturally-aspirated
4.3L V-6 LV3 naturally-aspirated
4.3L V-6 LV1 naturally-aspirated
6.6L V-8 L8T naturally-aspirated

Instead, the LT7 engine represents an all-new, sixth-generation DOHC V8 engine family that’s derived from the 4.2L Cadillac Blackwing engine (RPO Code LTA) and the LT7, a twin-turbocharged version of the LT6 that will be used in the C8 ZR1 and C8 Zora.