Can it be used on a 2.4L SS/NA? Also I read it can be adjusted "stiff" for track and "soft" for daily driving is this true? Is it worth getting? I know some will say motor mount however I like the fact it adjusts to "soft" for DD. So I might rather like that instead of a motor mount. Plus it seems to easily bolt right on or off and would be good if I had to go to the dealer. Opinions?