More responsiveness across the entire power band!

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The OEM 991 plenum is T-shaped, meaning the airflow from the throttle body abruptly changes direction as it is distributed to each side of the intake manifold. It makes sense to design a plenum with a Y shape instead of a T!

The do88 Plenum

The plenum is designed with soft, flowing lines. Radii and angles have been reworked and reworked many times. The ports are CNC-machined, and the plenum comes with matching silicone intake hoses for optimal fit and durability. The airflow improvement was verified using CFD (Computer Flow Dynamics) and on our Superflow SF1020 flow test bench.

Removing restrictions to the boosted air reaching the intake provides better throttle response and power gains across the entire powerband!

Key features

• More air to your engine, less backpressure and better airflow!
• Airflow at 0.1 bar / 1.45 psi pressure drop: 846 CFM (808 CFM), 5% higher!
• Freeform designed, cast aluminum with CNC-milled connections.
• Y-design for optimal air distribution.
• Comes with all necessary accessories for installation.