So i am new to owning an rv and just purchased a 1997 holiday rambler w a 7.5L in it . One thing I noticed is there is an exhaust leak and I've heard its probably the manifold as well as the air pump on it. Im wondering if i could do new headers and the just put a new buffer and turn it out . Anyone recommend an easy fix? Im mechanically inclined an can do the work just not sure exactly where it is leaking . Also ned the plastic grill believe its the vest for the hot water heater outside.I found a replacement metal vent for the stove just looking for some cosmetic things , Appreciate any help. Thanks