Large case 215mm welded differential with 2.56 & 2.81 ratios
Suitable For:
- E9x/E8x models
- F20/F30 models inc M140i/M240i (auto)
The Quaife automatic torque biasing (ATB®) limited slip differential stands as the ultimate traction upgrade for any vehicle equipped with a standard factory open differential. Often imitated but never surpassed, the Quaife ATB® delivers enhanced performance, providing improved traction, handling, and braking in all driving conditions.
Trusted by road car enthusiasts and motorsport competitors alike, this precision-engineered British-made differential is a direct replacement for standard differentials and is compatible with a wide range of front, rear, and four-wheel-drive vehicles. Since its introduction in the 1980s, the Quaife ATB® has proven its durability and effectiveness in high-performance environments such as rallying, circuit racing, rallycross, and Time Attack. Enhance your vehicle's control and enjoy superior performance, whether on the track or the open road.
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Lifetime Warranty: The Quaife ATB® comes with a lifetime warranty for both motorsport and road use, ensuring long-lasting reliability.
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British Quality Manufacturing: Proudly made in Great Britain, the Quaife ATB® is produced to rigorous ISO9001-2008 standards for superior performance.
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Trusted by Leading OEMs: Chosen by top manufacturers like Ford, Lotus, BMW, and GM, with zero warranty replacements reported.
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Zero Maintenance Components: Gear-operated with no service parts to replace—ever, ensuring hassle-free ownership.
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Reduces Torque Steer & Improves Handling: Dramatically minimizes unwanted torque steer, understeer, and oversteer for a smoother driving experience.
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Seamless Compatibility: Designed to work flawlessly with modern electronic stability and traction control systems in road cars.
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Enhanced Braking for FWD Vehicles: Improves braking performance on front-wheel-drive cars by reducing lock-up and minimizing ABS intrusion through efficient torque transfer.
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Safe and Smooth Operation: The Quaife ATB® delivers progressive, seamless action without ever fully locking, ensuring safe and controlled driving.
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Direct Replacement: A straightforward, direct swap for the factory ‘open’ differential unit, with no modifications required.
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Compatible with Standard Lubrication: Retains your vehicle's standard axle lubrication system and maintenance schedule.
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Proven Performance: With over 100,000 units sold globally since the 1980s, the Quaife ATB® is a trusted solution for improving vehicle traction and control.
At Matt Lewis Racing, we are proud to be based in the UK and committed to delivering our products to customers both domestically and internationally. Our goal is to provide fast, reliable shipping that makes it easy for you to receive your order as soon as possible.
Domestic Shipping:
- We ship to all locations within the UK, including England, Scotland, Wales, and Northern Ireland
- All orders to England & Wales will be shipped via Royal Mail or FedEx
- All orders to Northern Ireland, Scotland/Scottish Highlands & Islands and the British Isles will be shipped by Royal Mail or a suitable courier service available to select at checkout
- The Royal Mail 48 shipping option typically requires 2-3 working days* for delivery, while the Royal Mail 24 service generally takes 1-2 working days* to deliver
- Some items are not stocked and do not have a 24hr postage service available. This will be noted at the bottom of the item page
International Shipping:
- We offer international shipping to most countries around the world
- International orders will be shipped via a Royal Mail Tracked service or the courier selected at checkout
- Delivery time for international orders varies based on location & shipping service, but we will provide you with a tracking number at the time of shipping
- For all orders shipped by Royal Mail the overseas postal tracking service can be found here: https://www.royalmail.com/sending/international/overseas-postal-tracking
Most orders purchased before 3pm will be sent out the same day, unless there is a note at the bottom of the item page. This usually applies to non stocked items so please allow an extra 2-3 working days for delivery
Both UK & International Royal Mail services are updated with details of any delays here: https://www.royalmail.com/service-update
If your delivery address is located outside of the UK, you may be required to pay import duties and taxes. These charges are imposed by your country's customs authorities when the shipment arrives at your location. Customs policies differ among countries, and all international shipments may be subject to cross-border inspections. You will be responsible for any additional charges related to customs clearance, and we suggest that you contact your local customs office for more details
We understand that getting your products quickly is important to you, which is why we make every effort to get your order to you as soon as possible. If you have any questions about our shipping policy, please don't hesitate to contact us
*This is an estimated delivery aim from Royal Mail, not a guaranteed delivery time
At Matt Lewis Racing we want you to be completely satisfied with your purchase. If you’re unhappy with your purchase, please contact us immediately. We will first attempt to resolve your issue with the purchase or alternatively offer a refund or exchange in accordance with the below policy:
UK and EU Customers:
Under UK and EU consumer law you have the right to a refund of the purchased goods within 30 days. Within the 30 day period a refund or exchange will be conditional on the product and its packaging being returned in its original condition. You will be responsible for the postage cost of returning the goods
If the product is received by you, the consumer in a defective or damaged state we will offer a full refund or exchange. Photographic evidence will be required. The product will need to be returned before a refund or exchange can be processed
All returns MUST be authorised by us in advance
Customers Outside the UK & EU:
Customers outside the UK and EU are subject to the laws and regulations of their respective countries. We will comply with any applicable laws and regulations regarding returns, refunds, and exchanges. Please contact us for more information on returns and refunds outside of the UK and EU
Exchanges:
If you would like to exchange a product, please contact us with your order number and details of the product you would like to exchange. We will be happy to arrange an exchange for you, subject to availability
Refunds:
If you would like a refund, please contact us with your order number and details of the product you would like to return. We will process your refund within 48 hours of receiving the returned product. Please note that we will not be able to issue a refund until we have received the returned product
Exceptions:
Please note that certain products may be exempt from our refund and exchange policy. These include custom-made products, special orders, and products that have been used or damaged
If you have any questions or concerns about our refund and exchange policy, please do not hesitate to contact us. We believe that our customers should be completely satisfied with their purchase and will do our best to address your concerns
