The Eventuri intake system for the 991 Turbo was developed after extensive testing with the goal of making the turbo operate more efficiently. By replacing the single standard airbox with a patented individual Venturi filter housing, the turbo can generate boost and increase RPMs with less resistance. As a result, the wastegate duty cycle is reduced, and peak boost is achieved at lower RPMs, leading to improved performance. The two individual filters provide a larger filtration area compared to a single standard panel filter. Furthermore, to keep intake air temperatures low, the Venturi housings are sealed against air ducts that draw in outside air from the same locations as the standard system. Because the 911 Turbo's engine bay is so densely packed, a fully sealed intake system is the only way to effectively avoid high IATs (Intake Air Temperatures). The combination of smoother airflow to each turbo and lower IATs results in higher performance and sharper throttle response compared to the stock airbox.
The intake duct uses the original rubber cushions to seal against the underside of the trunk lid, extending downward from there to seal against the filter housings. Made from 100% pre-preg carbon fiber, the intake duct draws only ambient air, rather than the hot air inside the engine bay. Additionally, to maximize airflow, the transition from the circular opening of the filter housing to the single air inlet is as smooth as possible. The duct is also equipped with two drain tubes to discharge water from the filters. These tubes are designed to minimize air intake from the engine bay, as the fluid resistance within the tubes is greater compared to the opening at the top of the duct. This complex duct shape was necessary to navigate the various components located in the 991 Turbo engine bay.
The brackets are laser-cut from stainless steel and powder-coated. Meticulous care was taken to ensure the intake fits precisely into the mounting locations of the stock airbox. Not only do the brackets secure the intake to the chassis, but they also allow for the attachment of engine components just as they were with the stock airbox. To save weight, cutouts were intentionally made in each bracket, reducing material while maintaining the overall structural rigidity.
The entire system works in unison to provide a performance boost with better sound and feel than the stock airbox system.
The Eventuri 991 Turbo intake system consists of numerous components designed to serve a specific purpose and manufactured to the highest standards. The details of each component and the design philosophy behind them are as follows:
Compatibility: Porsche 991.1 991.2 Turbo, Turbo S
*Compatible with IPD Y-pipe
Each intake system includes:
- Carbon fiber Venturi housings with integrated tubes x 2
- Custom high-flow Generation 2 filters x 2
- Aluminum inlet cowls x 2
- Carbon fiber intake duct
- Laser-cut stainless steel brackets
Acceleration: 60-130mph reduced by 0.2 seconds
Before placing your order
〇 Regarding Import Consumption Tax
At the Shaftoya shopping site, we pay the import consumption tax incurred at the time of import on your behalf, so you will not be charged any additional fees beyond the total amount paid at checkout.
〇Confirmation of Compatibility
All product databases are based on North American vehicles (USDM), so please check the compatibility with Japanese vehicles (JDM) before placing your order. (If you are unsure whether the listed product is compatible with your vehicle, please feel free to contact us. Our support team will be happy to investigate for you.)
We cannot accept returns due to incompatibility if you place an order without confirming compatibility beforehand.
Please note that even if products are sorted by year, manufacturer, and model using the tabs on our homepage, it does not necessarily mean they will fit Japanese model vehicles without modification.
All products have been translated into Japanese using translation software. As there may be confusing expressions, please contact us if you have any questions before ordering.
○ Regarding Delivery
Shipping costs are paid at the time of payment. Shipping estimates are calculated automatically when you enter your shipping address on the checkout page. For large items such as body parts, the actual shipping cost may occasionally differ significantly from the amount calculated automatically. In such cases, we will contact you individually via email.
In principle, all products are shipped internationally from our US warehouse. Unlike domestic Japanese delivery, international shipping takes approximately 7 to 14 days, so please allow yourself enough time when ordering. If you are in a hurry, please contact us in advance to confirm the delivery date. Note that all items are transported via air freight. They are not shipped via sea freight.
○ Regarding Japanese Vehicle Inspection (Shaken) Compatibility
Please be aware that all products we handle are designed and manufactured outside of Japan. They are not compliant with "Japanese vehicle inspection standards," and we cannot provide documents such as strength calculation reports for Japanese vehicle inspections. Therefore, all parts are sold for the purpose of "use on circuits, private property, or off-road," and installation and use are at your own risk.
○ Regarding Warranty
Please check the contents immediately upon arrival. As all products are shipped internationally from outside Japan, there may be shipping damage to packaging or products. We only provide returns, refunds, or replacement exchanges for items with shipping damage, defective products, or incorrect items if you contact us within 7 days of receipt. Please understand that for products sold through us, warranty-related support will be handled "exclusively through us." We do not handle support through other companies or distributors located within Japan.