They are different, and not interchangeable.
Injen sells three SRI models, xA/xB/tC. The engine bays of the xA and xB are a little different. You have to make sure you but the right one.
"We LOVE rims boy... A brotha will put rims on a toaster if you let him!"
- Chris Rock
"I drive an xB.... No, not that one, the boxy one."