RHS flow #'s
In my opinion you can't get a better head that flows the way Brian is setting them up for the money!! This one is HARD to beat for sure.
FYI- Hughes sells them assembled, I called and talked to Kevin about 3 weeks ago to tell him the CC's were off on several sets of heads that have been checked and that they should check them out before selling them as 62cc and that the ones I know of came in at 66 & 67 cc's. His response was well I guess we should check a few on the pallet every once in a while. So if you bought RHS heads from them thinking they were 62cc, chances are very high that your compression ratio is LOWER than you think!! We are talking a 1/2 point in most cases!! That is not good at all! If you want them checked they charge $85.00 and then more to mill them down to your specs is what he told me.
That to me is not a True Machine Shop no way no how!