I keep on getting different views/opinions about which one flows better... from the factory. I want/need technical specs or proof of which one flows better. I don't care about speculation. I will have a turbo GSR EK hatch in the future but people keep on saying use the b16a2 head because it flows better. If it's getting rebuilt anyway, it doesn't matter...but I wanna know. And don't be like some people and argue with me about stupid pointless shit. <_< Thanks.