I have a maxed out car and when I race the same car they beat me by a full second how is that

It could be your shift timing it can play a factor also nos execution when you release no

When launch press nos with it don't shift on green shift blue before green

If your cars are exactly the same many reasons for you winning can be found, e.g. Shift timing, nos execution, start, or maybe they tuned there car rather than blindly upgrading anything they can afford, another reason is they could be using boosts to help give their car that final boost, also a little tip for you, shift when blue not green for that extra speed and try using boosts if possible and if your still struggling just try a pinks and win a new car, though I will not be responsible for giving you the idea if you lose that car, I hope I help you! And please add me! My names Racing Havok