Sounds just like it is - an LS3 without a tuned exhaust. Similar to a Vette, but with the ECM idle issues and unoptimized tuning. Just judging by what a tuned LS3 Vette sounds like now, this thing WILL sound much MEANER once tuned.
Stay frosty, people! You ain't heard NOTHIN yet!!!
(Corsa + cat-back + headers =
)
One example - and this wasn't "ballz-out" -- but still sounds schweet: