Ive dynoed two of them. The first one I did had motoworks, lid off and tune. 45.8whp
Second one I did had ron woods pipe, no box, big k@n and tune. It also made more power with the discs in the end. Believe it or not. Stock they both made around 40whp if I remember right.
Just for comparison an 06 ltr with dasa, fuel intake and pc makes 48whp on this dyno. 08 ltrs make around 50whp with this setup.