A family friend used to race cars. He was driving in an IROC type league with Mustangs. He realized after a couple of races that a lot of other cars could take the turns a lot faster than he could even though the cars were "all the same". They found out the faster cars had new Lincoln front springs installed. Calling around they couldn't find the springs so they rented a Lincoln and took them off just for that race.Back when Hertz rented Cobra Mustangs guys would rent them for the weekend, and swap engines with their cars. Sometimes the theft wasn’t noticed for months.
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