Forum Discussion
Paul_Clancy
Jan 12, 2013Explorer II
Simple answer - because they can and not all do. When a cheap box promises 100-200hp and better mileage the temptation is too great for some. Many gas truck owners chip them with far smaller gains. I have not and will not use a tuner. I also prefer the no stink or noise of the stock exhaust - some use a tuner to eliminate the emissions. As stock 365/685 is more than enough for my needs.
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