There is no parts store product that can double your mileage or power. If there was ford would've put it there. They spent millions developing the engine i doubt they would leave out a couple dollar part...
2008 Vista Blue SES Coupe 5spd FRPP Zx3B Suspension
5000K D2S Retrofit
130,000+ miles and still on factory brakes and clutch!
Rep Points dont add themselves