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It is just an exhaust from your catalytic converters back. Most are mandrel bent tubes and come with a performance muffler.
You will get the parts cheaper if you buy them yourself and then get a shop to install it if you don't want the hassle.
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2003 F150 4x4 FX4 (White): 5.4L, Custom Tuned Gryphon Programmer, DIY Air Intake Mod, True Duel Straight Pipes With X-Pipe, Factory Tech Separator Plate, F250 SD Trans Cooler, Digital Trans Temp Gauge, Timbren Rear Suspension Enhancement System, Mag-Hytech Rear Diff Cover.
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