Si tranny?

Hey everyone. I have a question about the Si tranny code. Does anyone know what it is? This girl has a transmission laying around and she doesnt know if its an Si or something else. Also, are there any of you that have an Si tranny that your willing to sell? Thanks for the help.

all 4th gen manual trannys were labeled L3. I'm not sure how you can find out if its a Si or not easily.

anyone else know? Its pretty important cuz the tranny is the last thing I need to do the swap.