The ZC trannys don't all come with a LSD just a feew probably the ones form the Integra I would gues but don't quote me on that. I have a ZC tranny with no LSD so I definetely know this is a fact and no I didn't get ripped cause I got the tranny for free. Also one thing to note is that the ZC tranny will not accept your axles as it uses B series axles not D series. Now if you are planning on getting one and doing a ZC/Si hybrid then you don't need to buy one with the LSD since the only way to use it is to get a ZC intermidiate shaft and axles form a Integra and and the hubs to as on the EF I don't think it will accept Bseries axles like the EG. Not sure on that though I didn't test mine while they were apart. Hit me up if you have any questions.