The Porsche 996 has become a much-loved modern classic of the 911 line, and Infinity Design developed this intake on the team's own low-mileage 2002 C4S. Development began by 3D-scanning the engine bay and 3D-printing a carbon-nylon prototype for real-world testing.
The design centres on a large venturi inlet tube with an integrated MAF sensor feeding a bespoke high-surface-area filter with a 170 mm (6¾") opening inside a large, sealed airbox. The snorkel cross-section is twice that of OEM and the airbox volume is significantly larger, creating an effective velocity stack and a much smoother path for incoming air. The latest revision uses a short, quickly flaring GT3-style inlet tube and a dual-feed airbox similar to later 911 models, with CFD showing smoother airflow and a cross-sectional area roughly three times larger before the filter.
Performance Testing
Both road and dyno testing were carried out. On an inertia Dynojet, gains were +3–4 whp between 4500–5500 rpm and +6–11 whp over 6000 rpm, peaking at +11 whp @ 7000 rpm. On a load-based Maha MSR 500 dyno the curve was fuller, showing +6–8 whp from 4500–7300 rpm with no low-rpm loss. This equates to roughly +8–12 flywheel hp above 4500 rpm — a genuine, realistic gain over an already-efficient OEM intake. The latest revision recorded a healthy +15 wheel hp.
Features
- +8–12 flywheel hp (real-world, above 4500 rpm)
- Large venturi inlet tube with integrated MAF sensor
- Sealed large-volume airbox with bespoke 170 mm filter
- Snorkel cross-section twice the OEM area
- To be produced in pre-preg autoclave carbon fibre, gloss or matte
- Improved throttle response and induction sound
Note: this product is currently in development. Please contact us for the latest availability and pricing.
SHIPPING
All items are subject to a handling period before they are dispatched. 99% of orders leave the warehouse within 1-3 days of payment. We will notify you by email when your items have been shipped. Most items should be received within 3-7 business days of your order date. This may be longer for international delivery.
* DELIVERY TIME= Processing Time + Shipping Time
* These shipping times are estimates, not guarantees but we always strive to get your order to you as soon as possible.
Shipping Costs:
● Shipping fees are calculated at checkout based on your location and the chosen shipping method.
Order Tracking:
● Once your order ships, you will receive a confirmation email with a tracking number and a link to monitor your shipment's status.
International Shipping:
● We ship internationally to selected countries. Rates and delivery times vary by destination.
Customs Fees and Import Duties:
● International orders may incur customs duties and taxes, which are the customer's responsibility. Please check with your local customs office for details.
Lost or Damaged Shipments:
● We are not liable for packages that are lost or damaged during shipping. For damaged items, please contact the shipping carrier to file a claim.
Customer Service Contact:
● For any questions regarding shipping, reach out to our customer service team at sales@sbxperformance.com
RETURN/REFUND POLICY
We have a 30-day return policy, which means you have 30 days of purchase your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
-Returns accepted within 30 days of purchase if the item is unused and in original packaging.
-Customer is responsible for return shipping unless the product is defective.
-Refunds processed within 5-7 business days after receiving the returned item.
To start a return, you can contact us at sales@sbxperformance.com.
If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
You can always contact us for any return question at sales@sbxperformance.com.
Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
We do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.
Unfortunately, we cannot accept returns on sale items or gift cards.
Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.
European Union 14 day cooling off period
Notwithstanding the above, if the merchandise is being shipped into the European Union, you have the right to cancel or return your order within 14 days, for any reason and without a justification. As above, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 10 business days. Please remember it can take some time for your bank or credit card company to process and post the refund too.
If more than 15 business days have passed since we’ve approved your return, please contact us at sales@sbxperformance.com.
