Inspect the factory installed muffler on your MH before considering replacement with an Aero Turbine straight through version. I considered doing that to mine, see signature, pulled the muffler to inspect it and discovered the factory installed muffler on our MH is a straight through version.
Get underneath with a tape measure, measure the distance from a point in front of the exhaust inlet to the muffler all the way to the end of the tail pipe and extension. Using a plumber or electrician "fish tape," feed it into the tailpipe. if you can feed more than what you measured, you already have a straight through muffler installed. Save your money for something else, no Aero Turbine necessary. That is, unless you actually do need to replace your muffler due to damage, burn through or it is corroded through and leaking.
2007 Winnebago Journey 34H
Toad, '08 Ford Taurus X
Blue OX, Aventa
US Gear UBS