I've got stainless steel 4-1 extractors with 1 7/8" primaries and 3" collectors, twin 3" 200cpsi Magnaflow cats, twin 3" system with 2 hi-flow magnaflow centre and single rear mufflers out to twin 3" tips on my wh grange and I drive it daily. Yes it's loud even at idle. Yes it turns heads. I have an otr, genuine c4b gts throttle body with 100% open mod, ls6 intake manifold and injectors, ls3 fuel rail, dremel ported 241 heads with c4b springs, retainers, and ls6 sodium filled valves and tuff mounts on the engine and trans. But no more attention than usual in fact it's never come up even at random drug/booze bus drive thru. It doesn't drone... I'm not gonna offer a suggestion as to whether or not you should get twin 3" but when I say it's loud, I mean I set off the occasional car alarm at shopping centre car parks when i turn it on...