For the E92 M3 (S65), Infinity Design opted for a complete redesign of the entire airbox. The factory intake elbow reduces considerably in size from the plenum opening to the airbox; simply enlarging or smoothing that elbow — the usual approach — has little effect on power because the OEM airbox itself remains restrictive. Instead, Infinity Design created an inlet tube that keeps the cross-sectional area of the plenum opening consistent and enlarges it, which required a complete airbox redesign to allow such a large tube to pass through.
The result is an inlet tube significantly larger in volume and cross-sectional area that gradually increases in size toward the large surface-area air filter, allowing the plenum to draw air to its maximum capacity.
High-Flow Air Filter
The bespoke short-stack, high-surface-area filter has a huge 170 mm (6¾") opening and is placed ahead of the inlet tube to form the largest possible velocity stack, directing airflow toward the outer walls to take full advantage of the intake tube.
Performance Testing
Dyno tests were performed under strict controlled conditions on an independent Dyno Dynamics machine. The test car was a 100% stock 2012 DCT with 62,000 miles, which recorded a healthy, genuine increase of 10–12 hp and 8–10 lb-ft from 6,000–8,300 rpm. The torque curve is almost identical at low rpm and only begins to gain after 4,000 rpm — especially after 6,000 rpm where air demand is highest — confirming a realistic result. Cars with exhausts that delete the restrictive primary catalytic converters will see similar or higher gains.
Features
- +10–12 hp and +8–10 lb-ft (dyno-verified)
- 100% pre-preg carbon fibre construction
- No ECU tuning required
- Improved throttle response
- Bespoke 170 mm high-flow filter forming the largest velocity stack
- Direct OEM fitment
- Available in gloss or matte carbon finish
What's in the Box
- 1 × Carbon Venturi Inlet Tube
- 1 × Full Carbon Lower Airbox
- 1 × Carbon Lid
- 1 × Air Filter
- 1 × Clamp
- 1 × Silicone Coupler
- 1 × Silicone Joiner
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.
