And that is a test we will be doing in house soon. We're really excited about the release of these new heads and will be developing our own porting program for them too. We will be testing these heads on so many combos, ie.) N/A only changing heads N/A with cams too N/A HCI stock and ported and the same with all FI applications. Even in stock form, these heads look very promising, and Trick Flow is genius for doing this and owning the market with the only aftermarket head option.