The S55 intake system for the BMW F80 M3 and F82 M4 is the result of extensive analysis and testing. The design is fully sealed with no gaps to ensure the lowest intake air temperatures, with the primary focus on keeping airflow as smooth as possible. Using the maximum space available, Infinity Design created the largest intake on the market, with air filter housings connecting directly to the OEM air feeds.
Both banks use large cross-sectional turbo inlet tubes with integrated MAFs and smooth expanding profiles. The expanding, large-volume inlet tube acts like a big velocity stack that accelerates airflow far more effectively than the short stack inside the OEM intake, giving far smoother low-rpm torque, vastly improved drivability and immediately sharper throttle response. The inlet tubes attach via stainless steel V-band clamps to the air filter housings, which mount directly to the OEM front air feeds.
High-Flow Air Filters
The system matches the factory intake for inlet temperatures while smoothing airflow and allowing more air into the turbos. Beyond looking the part, it increases available air and air speed into the turbos, helping them spool faster, filters efficiently for longer, keeps intake temperatures low and produces a sophisticated, race-car-like intake note under load.
Performance Testing
Dyno tests were performed under strict controlled conditions on a Dyno Dynamics machine, directly in line with the on-road experience. Average gains were +10–15 whp and +10 lb-ft, with an average peak of 15 whp @ 6,700 rpm and 12–15 whp from 5,800–7,500 rpm. The OEM system flows enough up to 4,000 rpm, after which power gradually increases to the limiter — equating to 12–16 flywheel hp from 5,800–7,500 rpm. The gains are realistic, with power increasing from 3,000 rpm onwards.
Features
- +10–15 whp and +10 lb-ft (dyno-verified; ~12–16 flywheel hp)
- 100% pre-preg carbon fibre construction
- No ECU tuning required
- Fully sealed, largest-on-market intake design
- Twin large cross-sectional inlet tubes with integrated MAFs
- Faster turbo spool-up and sharper throttle response
- Direct OEM fitment; gloss or matte carbon finish
What's in the Box
- 2 × Venturi Inlet Tube
- 1 × Turbo Inlet Tube
- 1 × Venturi Intake Tube with MAF and breather boss
- 2 × Air Filter Housing / Inlet Duct
- 2 × Bespoke Infinity Design Air Filter
- 2 × Black metal clamps
- 1 × Breather filter, silicone and CNC boss
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.
