just did that to mine today (still waiting a couple of parts before i install the procharger and I sold my K&N CAI)

looks good and truck seems to like it way better than it did when i stuck the stock intake back on it maybe next weekend I'll yank out the silencer if my other parts aren't in yet

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'01 Procharged
Lariat on a custom suspension w/ go fast mods - Tuned by Troyer (and a lil' something in the works)
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'03 Harley Davidson Edition -worlds first "Snake Bit" Harley Truck, shows in stock class,
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'New Eddie Bauer
Expedition - Tuned by VMP (boost coming soon)
old albums http://www.f150online.com/galleries/....cfm?gnum=8805