P0420 pops up after Header kit install - Page 2 - Power Hungry Performance Forum

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		Power Hungry Performance Forum > Ford F-150, Expedition, Navigator, Blackwood, Mark-LT, SVT Lightning and H-D Editions (Disabled) > 2009 to 2014 F-150
P0420 pops up after Header kit install

2009 to 2014 F-150
3.5L, 3.7L, 4.6L, 5.0L, 5.4L, and 6.2L equipped F-150s.

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#11

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Sun, October 3rd, 2010, 04:46 PM

jmt0645

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the noise is part of having headers. mine are the same way. i've forgotten about mine making noise till this thread

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#12

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Sun, October 3rd, 2010, 06:38 PM

martinoledad martinoledad is offline

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I kind of figured that. I had Longtubes on my other truck but that has been exactly a year almost and I just couldnt remember if they sounded like that or not.

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40 series Flowmasters, K@N CAI, Jet MAF, Troyer Under Drive Pulleys, Stainless Works Longtube headers/Hi Flow CATS w/X-pipe, Ram Air Hood G-Force, SCT X3 programmer with custom tunes

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