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UAW-Ford Contract Reveals 2013 Shelby GT500 To Get 5.8-Liter Supercharged V-8

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The UAW and Ford reached a contract agreement today that secures 12,000 new jobs in the U.S. by 2015, brings back into the U.S. previously outsourced work, and guarantees $16 billion in investments and upgrades to U.S.-based manufacturing. It also contains a small nugget about the upcoming 2013 Shelby Mustang GT500: a 5.8-liter supercharged engine.

According to the contract documents as scoured by MustangsDaily (and confirmed by us [PDF link]), part of the deal involves an upgrade at the Romeo Engine Plant to manufacture a new 5.8-liter supercharged V-8 engine that will replace the current 5.4-liter supercharged unit. The current GT500 uses the 5.4-liter aluminum-block engine.

The obvious implication is that the next GT500, which is already expected to grow in power, potentially up to 600 horsepower, will use the 5.8-liter supercharged V-8. A 400-cc increase in displacement could be enough to get the 50-plus-horsepower gains expected.

Previous reports have also hinted at precisely this upgrade, but the finding in the UAW contract documents (full contract in PDF form here) firms up the case for the larger V-8.

Read our previous report and check out our spy shots for more details on the 2013 Shelby Mustang GT500.
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