The easiest way to make your car sound mean as hell is to just run dumps....and this is coming from a guy who loves tail pipes, so i'm not biased. You sacrifice some droan, but if you want it to sound like it's going to eat the car in the next lane, that's how you get there. I love my MACs with dumps. The only thing i've heard that sounds meaner than my car IMO is some of the 4.6 setups because they're rippier and raspier. Of course, the meaner your motor actually is, the better your car is going to sound. I know a guy with a 408 who has the exact same exhaust setup as my car and it's twice as loud WITH tail pipes than my car is with dumps.