Didn't it come with instructions? It's just an easy bolt on...
Disconnect the negative battery wire.
Unbolt the tubing and filter/box and disconnect the Mass Airflow Sensor (It's a wire plugin).
Then take off the front bumper, remove the air box (resonator) that connects to the bottom part of the intake.
Put the new intake together and directly bolt it on, make sure to put the Mas Airflow Sensor back in the spot.
Sorry, this is kinda short... but I'd suggest you e-mail Injen for instructions.
Here's a couple pics of an AEM V2 on a 7th gen, kinda the same concept.

Here's where the sensor goes...

MAP sensor Diagram
Here's the thread that I found it from...
http://www.v6performance.net/forums/...r&pagenumber=1
Sign up, there's a lot of useful info for Accord owners on there. Referred by : clean2draccord