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Autocar and Birds have collaborated over the past 6 months on a project car, a BMW F20 M135i, by upgrading many different aspects of the model which are all included in the Birds B1 Complete Conversion package.

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"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...

Hi Kevin, I was home this last weekend for an unplanned visit and was able to try the car. The change is remarkable, with so much more compliance to the suspension and the car feels much more stable and planted,...