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| 2004 to 2008 F-150 and Mark-LT 4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs. |
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#8
Sun, April 19th, 2009, 01:11 PM
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See, thats what i was thinking, i mean, IMO, by the time it gets to the muffler, the muffler is probably just being used as a "silencer" i mean, its already gone through the restricted headers and the restricted cats right?
So unless i put some headers and highflow cats, the muffler is probably just sound....? Logical thinking or no? Please correct me if its not. Im here to learn 
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08 F150 Screw FX4 2.5 Level KIT. Volant CAI. Edge Programmer 
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