Tony, if your speaking about the wheels it would be the equivalent of about 150 lbs of unsprung weight. A tank of gas weights about 108 lbs.
How much of a difference can you tell when you drive your car with a passenger vs without? Lighter wheels take weight off of the suspension giving
you a better turn in feel to a corner with more precise steering. If your driving on the street it's going to be ok. If your on the track you will notice it.
On the current Z06 the $13,995 carbon fiber wheels save 41 lbs in unsprung weight and on a 2.5 mile road course lap saving 1 to 1.5 seconds a lap in
testing. It's a lot of money to replace one if it cracks when you hit a pothole as you cannot buy wheel and tire warranty on them. Same thing with
the Z07 Cup 2 tires. It's $10,344 for the option to get those tires which will save you another 1 second per lap but they will only last you 3 days on the
track before your into 4K for new ones.