Offically Amsoil does not make one for the 2001 model yet. The 2000 model filter will fit but I have had a problem with it deforming on the edge a bit. No leaks, but the amount of air seems to cause it to displace a little. I went back to a stock filter for now untill Amsoil comes out with a newer design. I'v used them on my other vechicle and have not had any problems with them. They work great. Just got to be patient untill they get one made for the 2001. Only other one I know of is the K&N and I guess you need to use a pre-filter with them cause you can see through them. Lots of pin holes. Some people like them though.
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Mundgyver : 2001 - 2500 QuadCab 4x4 139"WB, DK. Garnet Red Pearl Coat, Agate Inerior, Leather w/heat power adj both sides, 5. 9L HO 245Hp, 6 spd HD Manual, 3. 54 Axle, 21 Mpg Avg in town 24 Mpg Hw, OverHead Trip Computer/AntiTheft System, Mopar Tow Group Package. Add-on = EZ-Box=Haulin Butt, AMSOIL, PIAA SuperWhite 9004 HL's, Acrilic Black bug deflectors, Under Hood Full Radiator Bug&Gravel Screen, Cummins Exhaust Brake, Agate Dash Cover, AutoMeter SportComp Exhaust Gas/Boost/Oil Temp, Passport 7500 Detector, Garmen GPS III+, B&W Turnover Ball Model 1394R, LineX Bed Liner over the rails, Westin Step bars LineX coated. E-Mail at res02cke@gte.net -Working on the rest of the goodies as I can afford it.