I recently had a local gaarage put a dual exhaust on and he did an awesome job and the price was great the only thing is the muffle he used is not loud at all so I would like to chance I heard that the flowmaster 10 series is loud but also has a nice sound to it is this true... If not does anyone have any suggestions for me. I need to keep all cats and I need a muffler so I can't just straight pipe it either . Thank you for all your help.