I am looking to run this muffler:
https://vibrantperformance.com/catalog/product_info.php?cPath=1527_1032_1535_1110&products_id=1838&osCsid=d07db02f615673b01204da5d2734c50c
If you have the funds for a titatnium muffler, there are some very cool options out there... as for drone that is going to be a trial and error... I have flowmaster hushpowers now and while they meet before the exit I still need to tune with hemholtz J pipes. I have a good drone at the 2600 mark which is typical for dual can set up.