Moto Man wrote:No, the mounts vary a bit in thickness. You may or may not have clearance issues if you use different mounts.
OK..... Like I said they will all work on an S-chassis with either 3 motors. The thickness difference you are referring to is only millimeters.
One of the big issues that most run into is using Nismo instead of OEM mounts which are about 7-10mm thicker.
The only clearance issue would be that some strut tower bars won't clear and rub the valve cover after dropping in the new mounts. And also the people who run top mount turbo set-ups which is just for bling factor anyway.