One problem related to manifold/header/muffler/tail pipe has been reported for the 2011 Subaru Outback. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Subaru Outback based on all problems reported for the 2011 Outback.
My car just turned 17000 miles. I bought it new in 2011. It is garaged whenever not in use and have photos of it in the garage. The muffler and exhaust system are rusting very badly. I wash the car regularly when dirty. This should not be happening - there must be a defect in the type of materials used. I first noticed this back in June and it is getting worse. This should be replaced by Subaru - I shouldn't need a new muffler/exhaust system on a new car in less than 20,000 miles! I have taken photos of the problem that I can provide if requested.