This wont make a noticeable difference to exhaust noise if your still running the stock mufflers. Teflon just fitted the dump with a set of HKS rear cans and it only increased the sound marginally over stock.
If your after a nice induction noise, fit a HKS panel filter, remove the resonator and cut out the bottom of the airbox and seal it to the opening underneath into the inner guard. Prefect induction noise imo without being too intrusive.
You dont need a tune for the dump, but if you want to get the most from it, its recommended.