i would really like to improve the gas mileage on my car. im certain i might get 21 at best around the city and 26 highway. i still have 2:73s still on plus with the basic tune up. now im slapping in a o/r h-pipe and hopefully that increases my mileage a bit due to that the cats are choking up air. i heard pulleys would improve mileage as well. tires are set at 32 psi in the front and 35psi in the rear. 1 of my friends told me that by putting draglites would help also due to that they dont have alot of weight to spin once rotating. i know on our motors we are able to switch octanes around. im just thinking of ways of getting good mileage in addition with 3:73s compared to todays V8s