1 Series (F20/F21)

Click here to read the full online review of our M140i by CAR Magazine

Date 22/06/21 James Many thanks for the work that you and the team did on my car today. Suffice it to say that the work done met my expectations and the drive home was far less manic than on the way in to see you. I now have a car that feels planted and predictable. Not quite at the level of a Porsche Spyder but now close enough. Making the system design to achieve a result takes a lot of time and a somewhat focussed but ocd approach. All the right things to do in a business and I can only kick myself for not engaging yourselves sooner.

Date: 18/1/2021

Hi Kevin,

Date: 15/12/2020

Hi Matt,

Sorry for the late reply. After fitting the diff the car eventually made its way to Malaysia where I've moved to. I'm very pleased with it, the traction is definitely improved and I have a lot more confidence going into corners now. WIll leave some appropriate comments on the BabyBMW forum.

Kind regards,

Mr Segaran

Date: 29/10/2020

Hi Matt,

Thank you for contacting!

Feedback on the Quaife differential... unreal piece of kit! Transformed the car in such a positive manor, wasted too much time not having one on my car, feels a lot safer too! Two thumbs up from myself

Thank you for the sale of the differential! Best piece of kit I've ever had fitted to a car I've owned

Mr Walsh

"Berkshire-based BMW fettler sprinkles fairy dust on fast but flawed hatchback!"

Autocar review of Birds M140i B1 Conversion: https://www.autocar.co.uk/car-review/bmw/1-series/first-drives/birds-bmw-1-series-m140i-2020-uk-review

The review concentrates on our B1 Dynamics Package, which includes our B1 Sport Suspension and Quaife ATB Differential upgrades.

Date: 03/08/2020

For customers with highly modified cars, or who use their cars aggressively, or for those with high mileage cars looking to prolong the life of their differentials, we would recommend our high-performance bearings.

These uprated tapered bearings offer a 44% increase in load capacity compared to the standard BMW ball bearings, providing much improved durability and a longer lifespan.

Read the full review by EVO by clicking on the pictures below or by following this link: https://www.evo.co.uk/bmw/m140i/202709/birds-bmw-m140i-review-british-tuner-tweaks-bmws-rear-drive-hot-hatch

Date 12/05/2020

Hi Kevin,

Given the fact that the B-Series suspension kit was fitted today and my journey back to Sheffield isn’t enough to fully run everything in, I feel I need to give you some initial feedback.

All the reviews and claims made about this set up don’t do it justice unless you experience the before and after for yourself.

If someone had said to me that this kit was developed by a team of Lotus F1 engineers in Hethel, I would not have questioned it.