Go to your local pharmacy and buy a set of ear plugs. Also buy a cute card and write a loving note enclosing the ear plugs. Unless the Viper is your only car, it should sound the way you want it to sound subject to local noise restrictions. When your wife thinks about it, she may like the idea of ear plugs. She will not have to listen to you. LOL. On a more serious note, any system that eliminates the crossover is going to be a bit louder. Another system may also have more drone. Adding additional inline bullet mufflers, assuming there is room to do so, which I doubt, may affect performance.