I have had Line-X on my 99 Ram 1500, my uncles 1500 and my new 2500 (this past weekend) I have never had a problem with any of the 2 older ones in fact after a year my uncles looks like new, and trust me he is not good at keeping anything clean.
------------------
TAZ... 2001 2500 SLT+ 4X4 Auto ETC Cummins, LSD 3. 54,Quad Cab, Long Bed, Agate Leather, White/Driftwood Exterior, Sliding rear window, Camper Special Group, Towing Group, Cab clearance lights, Diesel Dynamics Stage-3's, DD Boost Module,SPA-Technique Digital Dual Gauges (Pyro/Boost, Trans pressure/temp) Aux. Backup lamps. BNM 5th Wheel Hitch, Additional Body Molding on Bed. BD Torc Loc, BD Pressure Loc.
2000 32' Aljo Triple Slide 5th Wheel.
http://www.ramtaz.com
Add on's to come: Exhaust Brake, Power Edge Box, B. K. 's TC and Valve body, Line-X bed-liner, and any other Ram Runner required modification...