Like tires impact the ride of your vehicle, so too does the track on a snowmobile. Control, stability and performance are all factors that are greatly influenced by the track. If you own an older sled, chances are it has an old, heavier and lower profile track. One upgrade that brings significant benefit is a track upgrade.
A new track will be lighter, yet can have a deeper profile which will also provide better traction and stability. Also, the lighter track will improve fuel economy and top end.