These Dynomax Ultraflows are amazing. Put two of these in place of the center mufflers and two 12" race bullets in place of the rear resonators on a 2018 5.7 300. Absolutely perfect sound for everyday driving without hum. I would highly recommend this setup to anyone who wants to hear their Hemi but isn't worried about upsetting their neighbors too much at 04:00 or upsetting their family in the back seat with a drone.