I have a HKS Racing Type 2 bov, which is normally somewhat quiet, unless you have a real small turbo. The racing type 2 is very similar to the super sequential, but with one big valve and some parts are interchangable. So i took the recirculation fitting out of my Type 2 and replaced it with a super sequential triple fin insert. In order for it to fit, you have to trim the two little tabs. Then it slides right in. For $12.50 this made a world of difference. Went from more of a swoosh to psssssssssssshhhhhhhh. The sound is carried out alot longer then before. I like it alot. Its something kinda different. Plus its easy to change out if you want something a little different every now and then. Just thought id share in case anyone else wants to try it.