Not really. The current Z06 is already tailhappy. There is no way the Lingenfelter would make it out of the 'Ring intact unless you pulled back significantly on the curves. Hell when Motor Trend did a comparo of Third-party-tuned super cars (including a Hennessey Venom Viper, a couple mustangs, and I think another c6), they could barely launch the thing because of all the fishtailing, and they ended up destroying the rear diff on one hard launch (I think after they switched to grippier tires, possibly slicks). Bottom line, I doubt the Lingenfelter Z06 would be able to utilize enough of its exra power to gain much on a car like the GT-R, which was engineered with curvy roads in mind.