hello im new here and ive been reading alot here but i have a question. i just purchased a 1989 fleetwood south wind 32 ft and i love it as a begginer rv as the wife and kids love it too. but the generator is very loud and by doing some research i found that there are mufflers that go up to the roof to quiet this down. its a 5.5 kw gen and what size muffler and where to get it ??? again thank you for any help that you can offer.