My brother has a 05 Dodge Ram 1500 4.7 he put true dual flowmaster dumps. And he is wondering why it isn't as loud as my 07 Dodge Ram 1500 5.7 HEMI, regular exhaust but with flowmaster 1 in 2 out muffler dump. I also had K&N cold air intake and he doesn't.
SO............. He wants to try and make it louder!!!!