I recently dyno tested AAEN new design and it did excellent against the pipe I tested against ... it pulls just as hard as any other pipe but has enough over rev to allow you to actually use the hp/tq it makes.  Idk when Olav plans to start building them as I have to bring my machine back across the lake for the fixture process...

Good stuff Mr S.......I have the current Aaen and while I like it I've been told it's not a great pipe.I haven't run any of the newer pipes though.Shearer,dynoport,etc so if Aaen does start producing a new one with good reviews I'll likely be giving him a call.