From The New York Times, Nov. 15, 2013
... After spending some quality time sliding around the Black Lake testing area at General Motors’ proving ground in Milford, Mich., I concluded that buying a ’Vette without the Z51 package would be like getting a puppy without a leash. If you spend a little bit more for a leash, you’re going to have a lot better control of that puppy, right?
And the Z51 package is a bargain. For $2,800 you get performance gearing, a transmission and differential cooler, bigger wheels and tires, bigger brakes, a firmer suspension, the dry-sump oil system and the pièce de résistance, that magic differential.
Read more here.