In regard to engine dress-up kits, did Ford PN C4OZ ... dress-up kit did come with open-letter Cobra valve covers, and the kit would be correct for your Mustang's build date.

Five years ago, Kenne Bell released its stunning '03 Mustang Cobra kit. With little more than ... could fit into the Terminator engine, it would free up power compared to the 2.2/2.6H blower.

At the time, the 2000 SVT Mustang Cobra R was the fastest factory-produced Mustang ever, primarily because of its 5.4-liter dual overhead cam V8 engine ... a ground effects kit and massive ...