I kinda forgot to mention that although I was skeptical about the flowrates claimed, that's just a small part of why I'm impressed. The casting quality is very very nice, the guides are a .500" top Viton seal and sized perfect (no white grease) real assembly lube, seats look awesome-I'm not going to mess with the valve job at all other than lap them in. The CNC step over is as fine as AFR's top option which I think they call "Race Ready" , the chamber shapes and top cut transitions in particular are a thing of beauty, the install heights are all right @ 1.950" with PAC springs and if I absolutely had to nit pick I would say the spring locators could be a snugger fit with the ID of the spring but that is really splitting hairs in my book. Very very well done Trickflow. J.Rob
