If loud is what you want,then you picked the correct ones.
Is there a reason for 3" ones,really built engine?
If you can fit 36" ones that would help quiet them down,but having 3" exhaust is going to be tough to keep quiet,plus reducing low end & mid range torque.
Having two, 2" glasspacks will work,but get as long as you can possibly fit to be sorta quiet.
I have a large 3" Gibson type round straight through muffler on my turbocharged Syclone,it is loud when you step on it,& having a turbo is like have another muffler.
MBHD