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Yep just living with it for now. As I mod I see if the changes make a difference. First I changed to an x pipe and it made things worse. So I thought maybe it is false knock which was what I was initially told. Changed To a catback went back to "normal" random knock in 1st 2nd 0.5-2.0. Changing...

Story of my life. Have knock all the time at part throttle in 1st and 2nd. ^ and the eco and gt are not similar in any way.

Any reason to switch from the oem if your na?

I am going. To ask them to relocate mine on arh. The front two are parallel to the ground and that seems to be the issue. Yea it stinks that they can't just get it right during manufacturing. https://www.*******************/forums/threads/long-tube-header-fix-with-pictures-no-more-bad-02s.942675/

Any problems with arh? I could probably tell the shop to fix it before the install .

I don't have a lund tune but my car is tuned. I see the knock sensors go off probably 25% of the time in first or second gear under very light throttle. Usually just a split second sometimes a little longer +0.5 sometimes up to +2.0. No clue what causes it I try to ignore it. Have been told I...

what is the deal with e85 and headers? I am getting american racing headers installed next week and I run e85 when I go to the drag strip. I have been reading there is issues with o2 sensors? Is this common occurrence or bad luck?

With ford calibration I ran 12.6 at 111-112 consistently. With flex fuel tune and e85 running 12.0 at 115-116.