NFS Carbon: Driving In Manual - How?

This probably isn’t the best place to ask this but what the hell. I started the game in Automatic and now I’m trying to switch to manual but I’m having problems. All I know is that you have to downshift before turns? Not really sure whats going on with that exactly, but my friend said the type of car you’re using (tuner, exotic, muscle) all turn differently in manual. Can anyone explain? Its really hard :frowning: