Sound Dampening

I was wondering if anybody had any idea of how thick of dynamat i should get. Also how much of the truck should i dampen. im about to have a stealthbox installed in my truck, i want to prevent future rattling and also improve the sound quality and block out exterior noises. i have a 2013 Tacoma double cab. Any insight would be very much appreciated.

 

Check out raamaudio and talk to them there. They will give you a package deal and its way better than Dynacrap.

Also deadening isn't really designed to reduce rattles. It's designed to deaden sounds.