Do the eagle heads have enough meat in them to resize the throat to accommodate bigger valves? Manley offers 2.08 valves for eagle heads, how they fit the bowl I can not answer The reason I ask is because you can always use a bigger valve assuming you have the material to resize the throat in accordance with the bigger valve. If that material is there, there's not much point in getting the stock APACHE heads if the plan is to CNC port them anyways. Assuming your not going the boosted route. stock Eagle valves are 2.08 I'm pretty sure. The reason to buy the Apache heads is to get a decent valve with the head already and last time I checked they were around the same price
Gen 3 power 6.22@110, 9.85@135
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