Dale Isley at TYMAR Performance. I don't recall exact price, but 2 with the shipping was not very much more than 1 @ NAPA. And he uses authentic Donaldson filters.
'94 1/2 F250 4x4, SuperCab XLT, 5 spd, SMF w/ Valaeo clutch, 4.10 (syn. lube), Cenex Maxtron 5W40 Syn, manual hubs, B&W Gooseneck hitch, Toyo M-55 tires in 235/85R16, authentic TYMAR intake, 4" AFE exhaust, FRP mod., SD starter, Isspro boost/pyro,digital thermometer, homebuilt exhaust brake, 188K Fresh factory injectors at 188K, TS-6 chip. "Its only a pickup. Trucks have a button on the shifter!"