Well yeh it will add weight but i dont think it anything to go by. Unless yours is Brawn gp car in disguise.
Well i went out again and it has go more quiet in there so maybe i was too critical i can hear the tyres alot so it must be cos there the original tyres that come from nissan, just changed to the same over the years,
ive got more Damplifier coming so when the cars wheels are off agin il put some in the arches but i would say that this has bin worth while.
The real test is the Motorway i think