does anyone know what the lightest exhaust is

looking to reduce the weight of the rear so i dont have to worry about the weight being carried on the subframe with allllll of my bags. de catted the original muffler but it still weighs a ton.

Because of the way it bolts on, it helps stiffen the frame. You will not see a measurable benefit in stress in the subframe by knocking a few pounds off of the muffler. That said, FMF does make a titanium 4.1, I'm not certain it is available for the R2. The Q4 is definately lighter than stock and not too obnoxious.