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FLowmaster question for 4.6l STX

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Old Jun 9, 2011 | 07:54 AM
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JB_85F150
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FLowmaster question for 4.6l STX

Hi guys,

I've got a 2004 F150 4.6l STX. I've already decided on Flowmaster.

My question is, since I'm pretty much going to run the same factory pipe that's already underneath the truck and just cut off the factory muffler, what size flowmaster do I need? From what I've found it looks like usually a 2.5" flowmaster is used, is that correct?

thanks,
Josh
 
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