GrimmSpeed BRZ//FR-S Intake - Manual (Page 14)

18. Getting close! Now adjust the intake tube so that the air filter end cap rests right in
the rounded edge on far side of the snorkel gasket (figure 22). This is the location
that tested best in our CFD modeling and evenly distributes the incoming airflow
around the entire surface of the filter (this is key!). Now, tighten that hose clamp
until snug as well (figure 23).