Quote:
Originally Posted by Dimman
In the side view, when they come off the plenum they look narrow, but they flare out to quite wide towards the head where the port injectors are.
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The runners are fairly tall/narrow up near the plenum, but Subaru heads typically have short/wide intake ports. My guess is that the cross-sectional area is constant, it's just that the geometry is changing to match up with the shape of the intake ports.