33 Differentials

We bought our M140i because this is the last manual non-M car!

It's to be kept by Birds as a landmark in the history of BMW drivers' cars. It represents the pinnacle of BMW’s endeavours since the 1970s to create the ultimate driving machine. In our opinion, the disappearance of the true drivers' car is a consequence of a hugely misguided emissions strategy for the motor industry, and we think no cars built since 2019 will have the attributes required by those of us who enjoy driving.

E60/E61 5 Series Quaife ATB Limited-Slip Diff SPECIAL OFFER

Birds are currently offering a special discount on our Quaife Automatic Torque-Biasing limited slip-differentials for the BMW E60/E61 5 Series models, including the popular 530d, 535d, and 550i. The retail price for the Quaife ATB kit is normally £1103.15 incl VAT, but we are offering a 15% parts discount until the end of February 2020, which brings the price down to £937.68 incl VAT (£1500 installed). 

Hi Guys

Just wanted to let you know, that i received the finale drive and everything went down perfectly. Fast shipping i must say, thank you for that.
Also i want to say i'm very pleased and surpriced of how it does transform the cars behavior.. You wonder why, bmw didnt mount a quaife in it from the production line.
Well, thanks for sorting me out, i will recommend people here in Denmark to do business with you guys, if they ever need a diff or something like that.

Date: 17/10/19

Grip unlocked, the Quaife has totally transformed the way the car feels.

Before the diff was fitted, hard acceleration in Sport+ resulted in the car waggling the back end all the way down the road with the traction control trying to keep the car in a straight line. Now the Quaife is fitted, same conditions but with DSC off, the car just accelerates straight as die with the only real drama being that you approach things a lot faster!

Thanks to Kevin and the team @birdsbmw for the great service and good chat.

@ram_m135i

The Quaife ATB limited-slip differential signifcantly improves traction on the standard Alpina D3, and we now have 3 brand new complete Quaife LSD-equipped final drives on offer.

F30/F31 Alpina D3 Biturbo owners now have the opportunity to upgrade from their high mileage, standard open differential to our brand new Quaife-equipped final drives with zero mileage.

Date: 24/9/19

Hi Matt,

Date: 06/09/19

Hi Kevin and team.

Just thought that I would let you know that I am delighted with the work carried out by you last month.The car is a pleasure to drive now especially on longer journeys and I really don't know how you've balanced the comfort level with me still being able to corner with ease and gain a lot more stability!Genius.I think those dampers react really quickly individually to pot holes and irregularities in the road surfaces to make a great ride!I will now have to save up for a brake upgrade...........

Many thanks,

Date: 02/09/19

Date: 02/09/19

Well Kevin,

Date: 8/8/2019

Hello Kevin,

I thought I would let you know that I am very happy with my “new car”. That is what it feels like ! A big step forward in drivability, really planted on the road now. Flatter cornering, really grips the road and allows you to corner in the wet with more speed and a bigger safety margin.

Very pleased indeed. Thank you !

Mr Davison