The current generation C7 Corvette originally debuted 4 years ago, back in 2013. It was not until 2015 did Chevrolet introduce the more powerful Z06 variant, along with some other optional peformance upgrades. However, the range topper ZR1 was no where to be found, with no annoucements having been made. Now, its appears as though the ZR1 has been leaked ahead of its official debut on the supposed December 2017 issue of Car and Driver magazine.
Compared to the Z06, the Corvette ZR1 pictured in the magazine cover has received new aero upgrades all around. In front, there is a different front bumper with larger vents coupled with an aggressive diffuser. There is also a new hood with a larger power buldge, similarly designed like that of C6 ZR1. Though there is no photo of the side and rear, its said in the digital copy of the magazine posted online says that everything from the A-pillar back is the same as a Z06 apart from the large rear wing and different wheels.
Powering the ZR1 is said to be the new GM LT5 engine, which is essentially the LT4 engine found in the Z06 albeit with a larger supercharger. Power is now rated at 750 PS and 922 Nm of torque thanks to a larger throttle body, revised fuel injection system and strengthened crankshaft. It comes available with either a 7-speed manual or an 8-speed automatic with supposed top speed in excess of 338 km/h.
As for its suspension set up, the Z06 and ZR1 use the same parts but have different tuning to handle the power increase and slight increase in weight of 63.5kg. Standard on the ZR1 are Z06's optional carbon ceramic brake rotors and calipers. The front wheels are also wider by half an inch, but sport the same standard tires as the Z06.
Essentially, think of the ZR1 as an uprated version of the Z06 with more power and downforce. According to Corvette Blogger, the 2019 Corvette ZR1 is expected to debut in Dubai this Saturday followed by the Los Angeles Auto Show later this month.