Vaughn Gittin Jr., is very excited to introduce the 2013 Mustang RTR Spec 1 and up to 624 horsepower Mustang RTR Spec 2. Like its previous versions, the 2013 Mustang RTR takes the best of multiple ...
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Drifter Vaughn Gittin, Jr. and his tuning ... but we're told the Mustang RTR will be available in both four- and eight-cylinder variants and in two states of tune, Spec 1 and Spec 2.