thats why they invented cored stock mufflers or earplugs
im in the same boat guys. But after hearing an exbox for 2-3 months, meh. Looks SICK, sounds....eh. This why i just ordered a bunch of pipes from JC Whitney...TO MAKE MY OWN!!!
seriously though, you can core your stock mufflers and it will sound much better. I am doing mine rightnow, except, i dont have a bike to hear how my core sounds.