well of course a couple of 4000d's and some 9500g's will make anything loud
Believe it or not there are many cars that work better than others.
And yes with the right equipment you can get any car loud, but in a diff car you would be able to tell a signifigant difference
but anyways i have/had a 3g taurus/sable and had a saz-1500d and a 15" juggernaut in it that was doing 145+'s in one car, and in my car barely broke 140
same equipment, different car (both were trunk car's, one coupe, one sedan) 5 db difference