Birds - BMW Performance Tuning

Birds - BMW Performance Tuning BMW Tuning Company & Specialist since 1985

Another E46 M3 having its worn out limited-slip diff replaced with the fit & forget Quaife ATB Differential! ⚙️🧰BMW no l...
13/05/2026

Another E46 M3 having its worn out limited-slip diff replaced with the fit & forget Quaife ATB Differential! ⚙️🧰

BMW no longer supports and offers replacement differentials for the E46 M3. When the OEM L*D eventually wears out and starts making noises, the only options are to have it rebuilt by a specialist or upgrade it with a reputable aftermarket L*D option.

The patented Quaife ATB Differential is the market leading torque-biasing L*D. Manufactured in Great Britain since the 1980s, and accompanied by its famous lifetime guarantee, the Quaife ATB has NO wearing internals. This means no service requirements, no performance deterioration, and no need to replace/rebuild in the future - the ultimate fit and forget limited-slip differential solution 🌟

*D


www.birdsauto.com
[email protected]
+44 1753 657 444

E82 135i duo ready to race with our QUAIFE limited-slip diff upgrades ⚙️⚙️- The patented ‘fit and forget’ QUAIFE ATB Dif...
10/04/2026

E82 135i duo ready to race with our QUAIFE limited-slip diff upgrades ⚙️⚙️

- The patented ‘fit and forget’ QUAIFE ATB Differential has been used worldwide in circuit racing and the open road since the 1980s. Its torque-biasing action provides a more progressive deployment of torque compared with aggressive clutch type L*Ds, making it a great choice for drivers looking to have some track fun too.

- The biggest benefit of the QUAIFE ATB is that it has no wearing internals, meaning no performance deterioration or need to replace/rebuild in the future. Couple this with our own uprated taper roller bearing upgrade, and you have a differential capable of withstanding immense torque loads for many thousands of miles.

*D

Birds BMW Quaife Engineering
www.birdsauto.com
[email protected]
+44 1753 657 444

The action never stops! 🧰 M140i’s, F31 335dx tourings and many more getting the treatment with our select upgrades; dam...
06/03/2026

The action never stops! 🧰 M140i’s, F31 335dx tourings and many more getting the treatment with our select upgrades;

dampers valved to Birds spec and matched springs for fast road use 💨
ATB limited-slip diffs for ultimate grip levels ⚙️
for the track-going customers looking for immense stopping power 🛑

upgrades L*D birdsbmw


www.birdsauto.com
[email protected]
+44 1753 657 444

BMW G30 540i QUAIFE L*D installation 🧰- The QUAIFE ATB Limited-Slip Differential is the ultimate fit and forget traction...
18/11/2025

BMW G30 540i QUAIFE L*D installation 🧰

- The QUAIFE ATB Limited-Slip Differential is the ultimate fit and forget traction solution for BMWs that came without an L*D from the factory ⚙️

- Complete QUAIFE L*D Differentials for BMWs provide a bolt-on ‘plug and play’ solution for customers worldwide. All differentials are fully reconditioned with new bearings (including the important input/pinion bearings), and are backed by a 24 month guarantee in addition to Quaife’s own limited lifetime guarantee 🌟




www.birdsauto.com
[email protected]
+44 1753 657 444

Waves of M140i’s in at Birds recently for their Quaife L*D and B1 Suspension upgrades 🧰The Quaife ATB limited-slip diff ...
08/10/2025

Waves of M140i’s in at Birds recently for their Quaife L*D and B1 Suspension upgrades 🧰

The Quaife ATB limited-slip diff is the market leading torque-biasing L*D, transforming the grip and handling of these powerful RWDs without wearing or deteriorating in performance. The ultimate ‘fit & forget’ limited-slip diff! 🌟

The B1 Sport Suspension is our own carefully developed and matched set of springs and uniquely valved Bilstein dampers designed for fast/daily UK road use 🔥




www.birdsauto.com
[email protected]
+44 1753 657 444

A nice variety of BMWs through the Birds workshop recently…From brand new Alpina B3 tourings all the way back to E30 M3’...
04/04/2025

A nice variety of BMWs through the Birds workshop recently…

From brand new Alpina B3 tourings all the way back to E30 M3’s and Hartge H26’s. A V12 850csi, an immaculate E24 635csi, and of course the usual crowd of 130i’s, M140i’s and 335dx’s getting their limited-slip diff and suspension upgrades! 🧰 🛠️

Another busy week of Quaife L*D and Suspension upgrades! 🧰 A pair of M140i’s, an M135i, F32 435i and an E82 135i DCT all...
14/03/2025

Another busy week of Quaife L*D and Suspension upgrades! 🧰

A pair of M140i’s, an M135i, F32 435i and an E82 135i DCT all getting the Birds treatment 🔥


www.birdsauto.com
[email protected]
+44 1753 657 444

Throwback Thursday. The legendary BMW 1600 GT in the flesh at 😍
13/03/2025

Throwback Thursday. The legendary BMW 1600 GT in the flesh at 😍

Still flat-out with M135i/M140i and M235i/M240i suspension and limited-slip diff upgrades 🔥If you want to transform the ...
06/02/2025

Still flat-out with M135i/M140i and M235i/M240i suspension and limited-slip diff upgrades 🔥

If you want to transform the ride, handling and grip levels of your ‘m-lite’, get in touch! 👇


www.birdsauto.com
[email protected]
+44 1753 657 444

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SL09HW

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Thursday 8:30am - 5pm
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