Can anyone post links on ebay/craigslist/ factory sites on anything thats cheaper than 300$ that can increase horsepower and or gas mileage? im talking anything to make a difference such as 1 hp increase or even 1 mpg increase, i'm young and can't spend big bucks for a long time, so i was wondering if anyone had knowledge or know hows or tips or hopefully links to cheap items, i don't even have 100$ right now im still waiting to graduate, im gonna be driving the old 2.8 v6 so it'd be appreiated, and with the gas prices any increase in mpgs would be very much so appreciated

 

a good tune up would be your best bet