straight through with the least bends as possible is what people won want a turbo in the near future will look for. More bends in an NA car isn't going to affect the overall horsepower as much, and it will likely gain a tad bit more torque due to a tad bit more backpressure.
keep in mind a tad bit is something you will never feel on the butt dyno. The difference isn't going to be noticeable between the /\ and the =
Ground clearance I believe was one of the reasons berk went with = as well, although it appears FI got everything under there with enough clearance.
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