just bought a 2001. 5 2500 diesel..... Love it, I got the added warranty that covers almost everything... . reading thru the warranty papers it stated that it must have factory approved items on it. I installed a 4" exhaust along with gauges, which should not cause problems, the question I have is I took off the old air filter and housing and installed a Afe filter with the shield. Will they void my warranty if I ever need engine work on the truck? I know allot of people here on the TDR have done it, will I have a problem? Thanks allot ... .