OK, I see what your saying with moving the HP down to a workable range. I guess that would be the real question. Would I get my peak HP down to around 5K rpm with the oval ports and would it be noticable? I understand the rect's don't do you much good without high comp and high RPM, but are they hurting me that much. I've been running them for years with no problems but was getting curious as to the noticable gain I could get with the ovals, and if it was worth it.