Turning it off is not needed it wont make you faster. Leave it on and enjoy the better mileage you get with it. its only working at part throttle so at WOT its closed and doesnt hurt your performance so leave it on and alone.
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Dustin
2002 GT Mustang 5-Speed
Drag Radials,Sprayed,Powershifted
 
WOOO HOOOO!
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