Has anyone actually just swapped to these heads without changing the rest of the setup (cams, intakes, etc,etc) and posted their findings, on any forum or shared amongst engine builders/ racers? Swapping from any oem head including those modified up to a certain point (porting and $$ spent) would obviously see varying degrees of impressive results one would think, only to diminish to the point of being negligible when compared to the other similar ootb aftermarket heads one may be swapping from. In the “jury is still out “ or “not enough evidence” phase more likely?
