i spent alittle over $1500 for my top swap including install, had it done last winter. for the money i wish i would of went turbo but ahwell im happy with the added compression and better gearing i got with having a n/a car before hand. oh and i see about 30-35mpg on the eway and about 18-22 in the city. highway mileage went up but city went down as can be expected getting into boost