To be honest, with the power of your 1-Series and the narrow tires that are on that car, even a drag slick will spin under 1st through 2nd gear power shifts. This is just an inevitable circumstance with the power the car has and the width of the tires that the vehicle permits.
The differential is definitely a great investment to reduce wheel spin under launches and offer additional grip under drag or road course circumstances.
-Charles@VMRWheels
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