Building a new engine would be a itch as well LOL when you change the header and take out the CAT you change a lot of the fueling among other things , engine safety sould be your first worry , then MPG
36 as you are now ? forget about any gains from a tune that that is killer mpg
The MPG tuning that I do most come back telling me 0 to 2.5 depending on how they drive , you alse get safety and better over all driveability
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