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Roush 2011 Mustang 5.0 ROUSHcharger - Click above for high-res image

The add-on will soon be legal for use in all 50 states, and those who already have ROUSHchargers can upgrade by ordering the new pulley for $389. A polished version of the supercharger is also available for $5,899. Installation won't alter the balance of your Ford warranty, which is a bonus, and the supercharger comes with its own year-long coverage if the manufacturer warranty has ended.

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