Quote:
Originally Posted by KillerBMotorsport
Merge angles come into play much more with N/A applications. the biggest mistakes I see with turbo Subaru headers is people applying N/A design principles to pressurized manifold. N/A and pressurized manifolds will benefit from their own unique ideal design characteristics.
Of course it can be overdone. The FA headers coming onto the market are a perfect example of horrible merge collectors. At some point, you are forcing gasses into other primaries, which is not ideal for unrestricted flow.
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But whats nice and different about this design as opposed to others is that they actually establish flow direction instead of one runner blowing into the opposing.