As soon as I resource some more materials and find a local mass loaded vinyl supplier I'm gonna add a deaden, absorb, block treatment. Big areas are gonna have dynamat, 1/8 ccf, 1/8 move. I'm going to get some 1/16 ccf for various tabs, connections, anything that can make contact. I haven't looked behind any of the pillars. A,B,C pillars in my 03 Sedan. Any problem areas here or air bag issues. I wasn't sure if the air bags were in any of the pillars or in the sides of the bottom of the headliner area above where all the pillars meet. Car will have a IDQ 12 and already getting alot of rattle and buzzing. Just wanted some advice for guys who found problem areas in the car after a sub install