There are better ways to reduce the "drone"
A lot of people like to believe in or propagate the Mystical magical drone killing of the Corsa, but if you have ever actually analyzed the Corsa compared to other systems there is a simple reason the Corsa eliminated the drone sound,
IT USES TWICE THE STEEL OF EVERYONE ELSE'S SYSTEM
The Corsa is double the weight of all the others out there, it is just multiple layers of stainless steel. the sound cancelling tech BS is just that BS, there is no way that the same muffler can be tuned to eliminate drone as created by numerous different headers and cams and valve configs.
If you think you will reduce weight by removing your stock system and replacing it with a Corsa, THINK AGAIN
The Corsa weighs the same as the entire stock system, including the crossover, not less
The easiest and lightest way to reduce drone is to add some heat heat shielding/sound deadening to the sills, if drone is an issue this will insulate you from the sound of the drone just as the extra layer of stainless does in the Corsa mufflers does