Hi there
I've done most of my S40 2001 with Dynamat Extreme, i.e. front doors, and all of the boot. I removed all the trim in the boot to achieve this, no big deal. Also the parcel shelf and the boot lid/shelf.
I think the car is quite quiet.....but then it was beforehand.
I did it mainly because I installed a decent sound system with amps and a sub.
I quite like the car with the sound system on and with it off. I think it makes a difference overall.
Its quite easy to do remove all the door trims, the only thing u need to be wary of is the 'seal' in the door. Basically a 'stuck' on piece of plastic sheet on the inside of all the doors that helps keep out the water.
Hope this helps
Matthew
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