With cats still on your car everything is going to have that bubbly sound, espically if you take off your mufflers, which is essntially what you are doing with the LoudMouths, I had flowmasters on mine before my header and x pipe conversion and they still had the grawl that you would expect from the legendary flowmaster 40 series, and I never had a personal problem with the drowning sound that is spoke of. Now that I put full length coated hookers and their x pipe without cats it is almost orgasmic everytime I start it up. I barely even listen to my radio anymore because I love it so much! Car alarms dont like me though, but I have had more compliments than in my 72 nova with a huge cammed small block.