Removing the resonators will make it only slightly louder. The GT500's are not known to be very loud so I'm not sure what you were expecting.
2017 Dodge Challenger T/A Redline Tri-Coat
2015 Dodge Challenger Scat Pack Jazz Blue Pearl Sold
2015 GT Premium 401A Ingot Silver Sold
2011 GT Premium 401A Grabber Blue Sold