The title pretty much sums it up, but when choosing a cylinder head, how do you make a knowledgeable decision on what will work the best?? Lets take for instance the major players here, AFR, Brodix, Dart , AllPro and Pro-Filer. Just for the sake of comparison, lets use a 210CC head. All of these companies make a 210 cc head with the exception of All Pro, they have a 220. Now for the general motor head, like myself who does not build engines for a living, just as a hobby, what do we base our decision on? Most people know that flow numbers are important, but not the most important part of what the head is capable of. Besides flow numbers, how would I make an educated decision on what to purchase..I know CSA and throat are extremely important as well, but how would I know what these values are if no one publishes them. I know alot of people will say the new AFR heads are the best, but what makes them the best??? Why/how are they better than the other heads I listed?? Because of flow numbers?? because of magazine tests?? It seems that magazines only test AFR stuff,I would imagine because they are all based in California.. I cant remember seeing a magazine test that used a Brodix or Dart head.. It seems to me that alot of engine builders use a specific brand, because they have good luck with it, or they buy in and get a good deal on them, so its hard to get an objective opinion.. So any insight would be appreciated... Thanks