Library

Series

NEW Mercedes Quaife ATB Limited-Slip Differential - QDF44B

The popular Quaife Automatic Torque-Biasing LSD is now available and in stock for various Mercedes C and E class models, exclusively at Birds.

Once installed, drivers will notice an immediate difference as the Quaife ATB automatically...
Testimonial - Quaife LSD - F20 M140i - Mr Palmes

Kevin,

Loving the quaife already! It feels so much better, so much more predicable when the back breaks away.

I used drive with the Dynamic Stability Control on the Sport+ setting before, because the car didn’t give me...
Mercedes Quaife ATB Limited-Slip Differential Special Offer June 2018!

We are pleased to announce a new special offer for our ever-popular Quaife ATB Limited-Slip Differentials, applicable to all available Mercedes models, for June and July 2018!

To...
100 Brand New BMW differentials for various E30, E32, E36 and E38 models now available!

Get them before they're gone!

Birds BMW have invested in over 100 brand new rear axle differentials straight from BMW’s warehouse, which are now all available on their newly opened eBay shop. You will find...
Testimonial - B3 Dynamics Package - E92 330i - Mr Robinson

Ian and the team.

Thank you so much for sorting out my car. It's unbelievable the difference to the original m sport setup. Good on the motorway but amazing on a and b roads over the weekend. Thanks once again.

Could you send...
Testimonial - Quaife LSD - F32 440i - Mr Smith

Kevin,

Just a quick note to say that I’m very happy with the mods you made to my 440 today. The gear change has improved immeasurably - shifts are shorter and the feel is much more mechanical. I adapted to the heavier...
Testimonial - B-Series Sport Suspension - F21 M140i - Mr Lamb

Morning Kevin

Just wanted to extend a big thank you to you and your team for transforming my car into something that I now love rather than like. The difference to its handling and ride quality is astonishing. Had a great drive home, but...
Video - Birds M135i Complete Conversion vs BMW M2 - Autocar Magazine

Autocar and Birds have collaborated over the past 6 months on a project car, a BMW F21 M135i, by upgrading many different aspects of the model which are all included in the Birds B1 Complete Conversion package.

...
Testimonial - B1 Dynamics Package - E82 135i - Mr Field

Kevin

Extremely wet track day a Croft on Monday car performed faultlessly

Hopefully there is an image attached

Many thanks to you and your staff
...
Editorial - F20 M135i - Birds B1 review and M2 comparison - Autocar - March 2018

"Our M135i out-punches the M2 by 25bhp and 51lb ft of torque, so it feels stronger through the mid-range and more urgent near the redline. But with less power to deploy to the road, and wider tyres with which to do it, the M2 does have...

Library

Get them before they're gone!