Stolen Engine

A blonde woman is driving a Porsche. She sees another blonde woman with a Porsche that has broken down on the side of the road. She stops to ask what's wrong. 

The owner of the broken Porsche said, 'I just had a look under the hood, well, while I was driving somebody had stolen the engine.' 

The other said, 'Oh, don't worry, I have a spare one in the back of my Porsche.

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