Hey I've had my 2006 taco prerunner for just over 2 years. Its a five speed 4 cylinder 2.7L and i love it. I'm at that point where I want to start toying around with it and improve a few things. Primarily gas mileage considering I drive over 80 miles a day. On a lesser note I would like to improve midrange torque because it would be nice to have a bit more pull when I hit it hard. Any ideas are welcome though I would appreciate a price range around $500. I have heard that increasing the voltage pushed through the spark plugs helps this. Any truth there?