mufflers for around the house use?

I made an exhuast for mine out of 2 sections of straight pipe and a cheap pair of welded mufflers. I used an old set of collector reducers, welded all to gether, but had to cut a small slice in the straight pipes to bend a slight angle in them. Welded a bolt thru the froor for the nuffler hanger. I can swap them on/off in 5 to 10 minutes. Cost was about 80 bucks. Only use them at home for running car without making neighbors angry.