8 2013 Mustang Gt500 Drag And Dyno To The 9S
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Fortunately, the 5.8 uses the same throttle body as the outgoing 5.4, so a throttle body swap is as simple as adding Ford Racing's twin 65mm unit (PN M-9926-CJ65; $649). Taken right from the Cobra Jet program, this billet beauty opens up each throttle bore by 5mm over the stock twin-60mm unit. That extra 10mm of flow delivered impressive gains at the back tires. View Related Article
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