The axles that turn the front wheels have a bend in the middle called a knuckle joint. This joint is encased in a rubber boot, packed with grease, called a CV Boot. You can see these if you look down at the back of the engine. They are ribbed. A CV boot will last a long time but needs to be replaced when the rubber tears due to age or bad road use.
Manual transmission models only.
A very popular feature. On all manual trans. Legacy Ls in the 1990s and many earlier models. Impreza Outback Sport, and previously seen on 1992-94 Turbo Sport Legacys. A radiator that cools the compressed air from a turbocharger before it enters the engine cylinders.