XR6T-Shane

hey fellas, going to do this tomorrow to my BA xr6t, but im more keen on the stututu noise instead of psshhhhhh. what else is needed to get the sttututu noise. I have the typhoon intake, KnN panel filter.

where can I get my hands on something like this... I want two of those sub boxes..

are the ebay straight swap intercoolers worth it. they look better but im just not sure if they are any good? has anyone bought one and noticed power gain?