Thinking of taking the APR mount out of my S3 for the same reason. It made changing gears feel much nicer but I drive in traffic every day and the vibrating at idle is getting a bit annoying.
Best bet its to ask if they can remove it for you so you can see what the difference is.
The guys at Harding Performance said if i wanted to have mine re-installed i could but i don't think i will.
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