964 primary muffler install

[MN-pdad]

Hey Guys,
I am in need of some quick help. I am removing a primary muffler bypass and installing the primary muffler.
Does anyone have a good instruction on how to? Do I need to remove the rear bumper cover?
The muffler looks like it could go either direction? there are brackets on the back of the muffler that have little ears on them do they go up or down?
TIA
Kris

[rattlsnak]

yes, you have to take the bumper off and if you hold the muffler in the 'installed position', the inlet and outlet point/curve downward.