The highly-anticipated Chevrolet Corvette ZR1, rumored to hit the streets by 2018, has been spotted roaming the streets of Michigan. Wearing heavy camouflage at the front and sporting a big wing atop its decklid, the test car seems to be identical to the one we saw earlier this year. However, we can now see it in action, hear its engine roar, and get a better glimpse of some its features.

The first thing that catches the eye as far as the exterior goes is the massive rear wing. As you may remember, the previous prototype came without the wing, but with two struts sticking out. It turns out that the aerodynamic device will be quite massive. What's more, the second prototype that shows up behind the first one carries a smaller wing, which could mean that the ZR1 might arrive in two configurations. The smaller wing would be standard, while the larger element could be optional or part of a more expensive, track-oriented package.

More importantly, the coupes are joined by a third, convertible prototype that also sports a rear wing. This could very well mean that Chevy is also preparing a drop-top ZR1. Granted, we haven't heard any rumors of such a variant, but it wouldn't be the first time that an automaker manages to keep a vehicle secret closer to launch.

Nothing else seems new from what we've already seen on previous test cars, but the ZR1 looks meaner than any other road-going Corvette launched up to this point. It's engine also has a nice rumble to it at cruising speed. On the other hand, we can't tell whether the V-8 is supercharged or turbocharged. Word has it the ZR1 will get the twin-turbo V-8 developed for the upcoming, mid-engine Corvette Zora, but we should find out more as the car moves closer to production.

Continue reading for the full story.

Why it matters

This new video not only confirms that development of the ZR1 is well underway, it also reveals that Chevrolet also wants to unleash a convertible alongside the coupe. It also speaks volumes of the company's plans for different aerodynamic packages, as well as the fact that the seventh-generation Corvette may hang around for at least a couple more years. There still isn't an official debut schedule, but most likely the ZR1 will break cover at the 2017 Detroit Auto Show in January, with sales to begin in the second half of next year.

Chevrolet Corvette ZR1

Read our full review on the Chevrolet Corvette ZR1 here.