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For some people, even the fastest cars in the world just aren't extreme enough. Thankfully there are always modifiers like Gemballa, which will make your Ferrari Enzo that bit nippier, or Litchfield, which can make your Subaru Impreza go quicker than a Lamborghini.

Here we celebrate some of the greatest cars, usually (but not always) made better by tuners such as Arden, Brabus and Gemballa.

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