I said this in your other thread...
For more noise just pull the bimodal fuse out (keeps the exhaust flaps open all the time). An OTR and tune also really helps them go and sound a lot better. Don't waste your money on headers and exhaust, nothing wrong with the stock headers and catback on a standard LS3
Daily: 2017 VF SS-V Redline Sportwagon
Weekender: 2014 Gen-F GTS