The C6 Z06's LS7 V8 engine was the most powerful naturally aspirated Chevrolet small-block engine up until 2021. 

The 2023 Corvette Z06's LT6 engine currently holds the record. Even though the vehicle is two generations older, the C6 Z06 Corvette still has a unique engine.

For even more weight savings, the engine is supported by a cradle made of lightweight magnesium alloy. 

With a weight of 3,130 lb, the C6 Z06 is one of the lightest Corvettes ever produced. The power-to-weight ratio was 6.2 lbs/hp, which indicates

To put that into perspective, the power-to-weight ratio of the 2011 Porsche 911 GT3 RS was 5.99 lbs/hp. These engines were all individually hand-built at GM's Wixom, Michigan, Performance Build Center. 

The sole available gearbox was a manual with a dry sump oiling system for effective cooling during prolonged high rpm racing.