drone

Hi i just got a muffler delete on my 09 cts sedan, there is alot of drone and was wondering if tgere was anything that could be done to cancel the drone, i was thinking maybe an extra set of resonators in the place of the old mufflers. Has anyone tried this or does anyone have any other...

Expecting to be flamed for this, but the exhaust drone from my stock ATS-V 8A at low speeds is getting on my nerves and I'd like to some silencers or additional resonators to quiet it down. Is it safe to assume this will void the factory warranty? I've considered less invasive options like...