Yes, It will block outside noises and make the stereo sound better, only time you should not, is when you are building a car to drag race with, becuase weight slows you down.
Sound deadening like fatmat, or dynamat
you should put your car in neutral when it has come to a complete stop, or when you turn it off or on
put a very cool muffler on it
Transmission problems.
An infant or car seat should never be put in a front passenger seat that has an air bag
There should be some kind of sound editing in the settings.
the transmition is sliping
all u have to do is put some sugar in the gas tank, its an old trick to make your car sound more powerful than it is, i do it all the time
does your car has a carburetor or is it fuel injected?AnswerIffn your car is FI, Gas in tankturn the ignition key on... but not to start, leave it there for five seconds. You should hear a whirring sound from the fuel pump. Then turn off. Do this five times (per Ford)It should fire right up.
Put The Volume Up
I do not know of any companies that install wireless surround sound for you. Regarding placement though, I think you would put them in the corners of your car, as that's what generally gives you a good surround sound experience.
Lock your door, and put on your seatbelt.