The GR86 is a back-to-basics sports car that is hugely fun to drive, but its intake leaves room for improvement: the induction sound is largely artificial and piped through the speakers, the airbox is small with Helmholtz resonators that quieten induction, and there is a distinct hesitation at low rpm. Infinity Design's goal was a full redesign for faster throttle response, improved torque under partial and full load, and far more genuine induction sound — the least powerful car the company has developed for, but the most rewarding.
Development Process
Multiple prototypes were built. An early version with an additional small secondary feed showed no power gain and a new torque dip, with CFD revealing turbulence ahead of the filter. The final design keeps a single direct feed but doubles the cross-sectional area of the front inlet, extends the snorkel forward with a bell mouth to smooth airflow, and uses a much larger filter housing with the largest possible venturi inlet tube. CFD then showed less turbulence than OEM with vastly increased airflow.
Performance Testing
Dyno tests were performed under strict controlled conditions on an independent Maha MSR500 dynamometer. The stock car made 228 bhp and 179 lb-ft; after fitting the intake it produced 239 bhp and 184 lb-ft — clear gains of 11 bhp and 5 lb-ft peak. A 10 lb-ft torque gain was seen from 2,000–3,000 rpm, with significant power and torque gains from 6,000 rpm to redline. Independent tests by Driven Media and Tegiwa returned strongly positive results.
Features
- +11 bhp and +5 lb-ft peak (dyno-verified), +10 lb-ft low-end torque
- 100% pre-preg carbon fibre construction
- No ECU tuning required
- Extended snorkel with bell mouth and doubled front-inlet area
- Bespoke 170 mm high-flow filter / large velocity stack
- Improved throttle response and genuine induction sound
- Direct OEM fitment; gloss or matte carbon finish
What's in the Box
- 1 × Venturi Inlet Tube
- 1 × Air Filter Housing / Inlet Duct
- 1 × Snorkel
- 1 × Bespoke Infinity Design Air Filter
- 1 × Black metal clamp
- 1 × Silicone Joiner with Clamps
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.
