Quote Originally Posted by chylld
defense pak sound protection (official honda accessory)
what is it: wax/tar compound sprayed onto the underbody of the car, including wheel arches
result: noticeable drop in road noise. if you split up road noise into the deep 'rumbling' sound and the more white-noise sound of tyres running over tarmac, then you could say it cut down the latter to the point where it can no longer be heard over the former.

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how expensive was that accessory? sounds excellent and im tempted to add it to my civic....