The OEM 997.1 plenum is T-shaped, meaning airflow from the throttle body abruptly changes direction as it's divided to each side of the intake manifold. do88's replacement uses a genuinely more efficient Y-shape instead, distributing air more evenly with less pressure drop.
Cast aluminium construction achieves the soft, sweeping shapes needed for optimal airflow, something CNC-machining simply cannot replicate. CNC-machined connections and matched silicone hoses ensure optimum fitment and durability.
Please select your throttle body size at checkout: OEM 74mm or GT3 82mm, these are separate, non-interchangeable versions matched to your exact throttle body.
Why Choose This Plenum
Y-joint design, genuinely more efficient airflow distribution than the OE T-shape
