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do88 Plenum Porsche 997.1 Turbo (2007-2009)

SKU: DOBTR-150-OEM
Price
$692.40
Currently Backordered - You can still place your order and we'll ship your order as soon as the product is back in stock!

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Installation Services

Don’t worry about the hassle — let our expert team at Forza Motorworks handle the installation for you. Our professional installation ensures everything fits and operates exactly as intended, giving you clean, factory-quality results, proper wiring or mounting, and avoiding the risks of DIY mistakes. You’ll save time, avoid frustration, and get peace of mind knowing the job is done right the first time. Contact us to learn about our installation services and enjoy a seamless upgrade from day one.

FAQ

Shipping Information
For items that are in stock, purchases made after 9am EST will be usually be shipped out in the next 1-2 business days. Please inquire to confirm lead times if you have specific time constraints. Orders will be sent via signature required at our discretion unless otherwise requested.

International Shipping
Any and all customs duties, taxes, import fees, and/or tariffs assessed in connection with the purchase shall be the sole responsibility of the customer/end user.

Return Policy
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return. To be eligible for a return, your item must be in the same condition that you received it, unused and in its original packaging. All returns are subject to a restocking fee based on item and package condition. Buyer is responsible for paying for return shipping costs. If you need a return label, we will email you a return label and deduct cost from refund. Original shipping costs are not refundable. Special order items are not eligible for return.

Cancellation Policy
In order to cancel your order you must email within 24 hours of placing your order or before your order has shipped, whichever occurs first. Special order items are not eligible for cancelation.

Exchange Policy
We have a 30-day exchange policy, which means you have 30 days after receiving your item to request an exchange. To be eligible for an exchange, your item must be brand new in box. Buyer is responsible for paying all shipping costs to exchange product.

Product 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.