Well that depends on what you have. The Firestorm doesn't have the best stats, and if you have played the last episode then you have a chance to test drive it before trying to unlock it. If you have the Hanzo FX 350 or the Elite GT12 you probably don't need it (or want it)....I am assuming you have the Hanzo if your asking about the Firestorm tho. The only car better than the Hanzo is the Elite GT12, which you can unlock by getting first in all of the Elite Races (way easier than getting first in every race).