WRONG!!!!!!!!!
Well, stock it gets bad mileage...
I drive to Tucson about once or twice a month from Buckeye Arizona... and when i drive my 4Runner I arrive in Tucson w around 1/4 of a tank left and need to fill up so I have gas to make it back home. I like to take my wifes car because she gets much better gas mileage than my car, its a new Toyota Corolla and it has a smaller tank but gets great mileage.
I just added a new exhaust system on my 4Runner and I honestly cant believe the improvement in mileage,... i can make it round trip to Tucson on a single tank of gas and have 50 miles to spare. I cant do that with my wifes Corolla.
what exhaust system might this be? I cant imagine an exhaust system improving anything other than noise. Now if your y-pipe and cats were deleted in the process that might make more sense.
