Hey D,
Figure was on Armour Motorsport dyno up here in Sydney. Another 10hp if I build an airbox as the quads pick up warm stagnant air.
Sr20 Ve with 4age blacktop quads on E85. Only running N1 cams but head has been touched and a LOT of time and effort has gone into the extractors and merge collector. A lot of HP can be sacrificed with the wrong design

Should be a photo in my album I think.
Cheers.