1 Series (F20/F21)

Hi Kevin

The Quaife LSD has transformed the car - so much more traction especially in the wet. The car is much more rewarding to drive.

Thanks again.

Mr Green

Date: 26/07/2017

Hi Kevin,

Date: 20/07/201

Hi Kevin

What a difference! Now have a car I can enjoy - rather than sell! Motorway, A roads, B roads - all so much better. There's a subtlety and compliance to the suspension that didn't begin to exist before. Will 'review' further in a week or so. With many thanks in the meantime.

The popular QUAIFE ATB Limited-Slip Differential is now available and in stock for the F20 M140i, F22 M240i, F30 340i and F32 440i, exclusively at BIRDS.

The Quaife ATB Differential provides significantly improved traction and handling for powerful rear-wheel drive cars, and is an absolute must-have performance upgrade for owners of these brilliant driving machines.

Date: 16/02/2017

Good day James

Watch BBC Top Gear presenter Chris Harris demonstrate the Quaife ATB's capabilities in our E92 335i!

The Quaife ATB Differential provides significantly improved traction and handling for powerful rear-wheel drive BMW and Mercedes cars.

Hi James,

Hi Kevin,

Just wanted to say thanks to you and the team at Birds for dealing with me and the car so well yesterday. Having been up at 3am in order to ensure I was with you by 8.30am having travelled down from Rochdale, you and the guys understood my need to be back home that night at costs as I cannot leave my wife on her own overnight for medical reasons. The technician did a great job to have me back on my way home with the job complete by 5pm. Amazingly I was home at 8.15pm (on the same day!)

The popular Quaife LSD (limited slip differential) is now available and IN STOCK for the new F22 M235i, exclusively at BIRDS.