He means exhaust end and inlet end.
It depends whether you want to take the whole thing off or just block the flow. If you only want to blank it you can just undo the allen bolts and loosen that 13mm to get the plate in as described above.
To take the whole thing off you'll need to undo the 3(?) brackets holding it in place and all the bolts at both ends, once you've done that it'll pretty much fall off in your hands. You'll also need two blanking plates, one for each port, and to blank the vacuum actuator pipe.
It depends whether you want to take the whole thing off or just block the flow. If you only want to blank it you can just undo the allen bolts and loosen that 13mm to get the plate in as described above.
To take the whole thing off you'll need to undo the 3(?) brackets holding it in place and all the bolts at both ends, once you've done that it'll pretty much fall off in your hands. You'll also need two blanking plates, one for each port, and to blank the vacuum actuator pipe.