How effective is this shit? is it worth the money? how hard is it to lay out and what exactly does it do? I plan to do a build in my truck here really soon gonna throw a XXX in it and i want it to sound ****in badass.
Also should i only deaden the doors and floor, or should i do the roof also? Should i cover the back cab vents or no? the flaps on them rattle like crazy, you cant hear it inside but you can hear it outside. Someone said it will ruin my air conditioning if i cover those vents.