John Hennessey did and the Manual 6-speed version of the ZL1 tops out at 173MPH according to him. Top of 5th gear at 6600 RPM.
It's odd chevy would gear it in such a way. The Nurburgring video has the ZL1 doing 181 MPH on the long straight, and spends nearly 20 seconds at 175-178 (Slight turn slows the pulling)...So what then? The manual car would just be banging repeatedly off the limiter at 173? Shifting into 6th makes the car slow down in stock form......
Start watching at 7:05