Question: how long does it take to install a new muffler?
Answer: Replacing a muffler should take no more than an hour, with the mid-pipe clocking in at a similar time. The downpipe, however, as it's the deepest part of the exhaust takes between 2-3 hours, with any combination of the three adding time on time. We've had reports of garages charging upwards of 8 hours.