After Ferrari's effort last year, Red Bull is so confident in Vettel securing his 4th championship they are preparing him special edition FX50.

When asked about his new ride for the race, Vettel seemed delighted,
"Oh yes, this will suit me well. It has a horn that I can blast at the
Marussias and Caterhams for when they get in my way. I can also wave my
signature finger out the window when I win."

Horner decided that it would be a better strategy
for Webber to race in a standard FX40. He said, "Not only will
this give him (Vettel) a better race strategy, but Webber should have
gotten around Grosjean."

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Mercedes is preparing two AMG ML63's for the race in order to counter the Red Bull FX's.