You do need to use the z6 mount. I had a y8 that I put into my civic and the rear mount is too short by about a 1/4" and the trans mount is no where close to being the same. I had to scavenge the one off of my d15 that I had. So use the z6 one. The "everthing" from a 5th gen to a 6th gen engine bay is different so the mounts have to go to different places.Green 91 said:yes. i think you might need to use the z6 mount, not sure.