I was told that a ITR and LS aem short and cold air intakes are both identicle in the bends etc. Is this true?

 

The piping on the intake are all identical, weather it's a short ram or CAI.

 

Size difference. On AEM intakes I believe the LS piping is 2.5" and the ITR piping
is 3". Civic Si's have 2.75" piping...I'm not sure if you can use the Si intake though.

Bends should be the same unless it's a GSR. GSR's tb is a little lower because of it's IM design.