Do88 High-Flow Plenum Intake Manifold for Porsche 997.1 Turbo (2007–2009)

Description

The DO88 Performance Plenum for the Porsche 911 997.1 Turbo is a high-flow intake upgrade designed to improve engine breathing and unleash more of your engine’s potential. Replacing the restrictive OEM T-shaped plenum with a smooth, Y-shaped cast design significantly enhances airflow efficiency and reduces pressure losses at higher RPM and boost levels. Available in configurations for the stock 74 mm throttle body or larger 82 mm GT3 throttle body, this plenum supports upgrades and tuning that raise power output and responsiveness. Precision CNC machined connections and a polished interior surface optimize the air path for better throttle response, torque delivery, and overall engine performance. Built as a complete bolt-on solution with all necessary hardware included, DO88’s plenum is ideal for both street performance and track-oriented Turbo 997 builds.

Fitment Notes

• Fits Porsche 911 997.1 Turbo (2007–2009)

• Choose plenum version based on throttle body diameter: OEM 74 mm or GT3 82 mm

• Direct bolt-on replacement for the factory plenum

• Throttle body not included (requires existing or upgraded throttle body)

Included

• DO88 high-flow intake plenum (selected throttle body fitment)

• CNC-machined adapter/gaskets (if applicable for OEM 74 mm version)

• Mounting hardware and seals required for installation

• Installation instructions

Product Specs

• Y-shaped high flow cast plenum body

• Available for OEM 74 mm or GT3 82 mm throttle body

• Smooth internal flow surface for reduced turbulence and pressure drop

• Cast pipe with precision CNC machined connections

• Bolt-on fitment with factory mounting points

• Product weight designed to balance structure and performance (varies by version)

Product Features

• Improved airflow efficiency: Y-shaped design enhances air distribution compared to the OEM T-shaped plenum, reducing abrupt direction changes and improving volumetric efficiency.

• Higher flow rates: Up to 34% better airflow with the GT3-sized 82 mm throttle body and 18% better flow with the OEM 74 mm setup at the same pressure drop, allowing your engine to breathe more effectively.

• Supports performance upgrades: Works in conjunction with higher boost levels and ECU tunes, making it ideal for Stage 1+ builds where intake restrictions become limiting.

• Precision build quality: High-quality casting and CNC-machined interfaces promote reliability and repeatable performance.

• Optimized throttle response: Smoother airflow path contributes to quicker throttle transitions and improved torque delivery across the RPM range.

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