I noticed the growl from the engine did change sound a bit meater definately better than before, but I got the engine mount fitted at around the same time as the remap so not sure if its the remap or mount.
I know A lot of the ST owners swapped from the vibratech to the pumaspeed one as the vibration was greatly reduced, all I can say is I've not noticed any difference vibration wise, but the gear change and general driving was greatly improved
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