from what i remember thers is a way to tell is you have an Si trans , Im not completely sure but i remeber there was a number stamp on the casting right abovr the passenger side axelseAL. . . again im not sure and dont really remeber since it was over ten years ago when i had hte zc hatches. BUt i did find the info on the net before im sure if you take your time and google it something will come up. GL



-eRNIE