but to tell the truth between the too which is what.....only how you can tell is take it apart an count the teeth....or drive it.... if your doing 70mph an your at over 4500 rpm then your a b16 , but if your at 2800 then your a ls ....but 100% you would have to take it apart....tell him it is a B16 tranny an have a good day an dont worry about it you got your money right?