The XLR8 app uses an Android or iPhone's accelerometers to match your car's movement with the sampled engine sound of a Ford GT40, Ferrari, Lamborghini or Nascar racer.
Transportation Secretary Ray LaHood told Congressional leaders on Tuesday that further review was necessary on a rule mandating rearview cameras on all passenger vehicles.
Federal regulators plan to announce this week that automakers will be required to put rearview cameras in all passenger vehicles by 2014 to help drivers see what is behind them.
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