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i'm going to be receiving my CMF header soon and am looking into getting a tune. i know some say it's not needed but if i am running too rich i am going to lean it out.

i know wideband is the way to go to get accurate readings and have to get another bung welded on the exhaust (what is a good location?) for the new sensor. my question to those who have used this controller themselves or have knowledge of using it is, when running the program do i basically just slowly lean out the ratio to a number that my car responds to best without going too lean?
 

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I hope your doing all your tunning on a Dyno and have something like Super AFC or some other fuel computer.

As for placement, I have heard people put them between the front and rear down pipes. I my self would put it after, just before the sensor for the last cat before it heads to the muffler.
 
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