Thread: can someone tell me?
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Old Sun, April 4th, 2010, 12:18 AM
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Quote:
Originally Posted by MacsFX4 View Post
right now i have a 2004 f150 fx4 and i have a S&B intake and true duals with X pipe. and i have the gryphon with the custom tunes for my truck but will it hurt anything if i delete the rear cats or cut everything off and put highflows on their.. in other words do i need to get different custom tunes if i do this..
Nope.
No changes required.
Just make sure to get the o2 sensers back in the right locations.
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