Thanks for the suggestions so far, guys! I am a bit ignorant in the science behind exhaust acoustics so please forgive me.

Can simply adding the glasspack type mufflers behind the Flowmasters really quiet it down that much? I saw the Magnaflows and Dynomax has their version of these as well.

I am alright with trying simply adding the glasspacks but I am wondering if I am not happy and then have to take it in again to swap the Flowmasters out, if I should just do everything at once? I hate to ditch these things as they sound so bad ace outside the car but the drone is just killing me.

Anybody here just added the glaspacks behind a noisy muffler and gotten really good results or should I just swap out the Flowmasters as well? Would the Dynomax Ultra Flow + glasspacks be too quiet or still beefy enough?