I like them alot,I have two 12' and they get loud! SQ is great and they are light(12 pounds)main reason for buying them.whole system weights 50 pounds and does not kill your cars prefomance and saves gas
Depends on the type of car you drive,but yes it will.If you are constantly lugging aroung 100+ pounds in your trunk of course your going to save gas!Your car has to work harder everytime you leave a stoplight.ect Its not going to add up to much but you will burn more gas