Aside from buying a new exhaust system ... have you checked to see if anyone or that manufacturer themselves make a silencer for your exhaust?
I've noticed that Silencers aren't as popular as they use to be. Years back, they use to ship silencers with exhausts for the reason of giving the owner an option to pull back the sound.
Hatch Nation Member: #147
R.I.P - FELLOW FF MEMBER, IZZY, BLK2k3GTS, will always be remembered. We will compete on a different course again one day.