So I just bought an '04 s with Remus exhaust on it. I like the sound when I open the car, but the drone on the highway gets a bit annoying. I was looking at the Alta one side system, but was hoping to get some advise and opinions the systems available for my car.

 

i have the alta exhaust.... i find it is fine on the highway if you keep to the speed limit . (90k here in canada) if you go over that speed it will have a loud drone as well.
it is a great sounding exhaust from the outside of the car , i am running a obx header with rmw head and cam as well. the sound of the exhaust did change through all the modds , but the drone is the same and starts at about 95k speed.