So since "LGT" is in my car description, I automatically have ZERO credibility when offering any input I have on ANY subject not relating to turbocharging?
Subaru engineers put the UEL manifolds on turbocharged models because it was cost effective, and any power losses could be negated by changing turbos, tunes, etc.
Why did those same engineers spend who knows how much time and more importantly MONEY developing a completely different system for the N/A models when the turbo model thay already had on the shelf would make their N/A engine develop more power?
Oh, and the UEL manifolds on turbo models are the suspected reason why cylinders 2 and 4 are always the ones that have cracked ringlands... Great design.
Wait, nevermind. I forgot that the ej255/257 engines were designed with alien technology and run on nuclear fusion.