Steel sleeve manufactured specifically for the 16+ Q50/Q60 RWD & AWD rear subframe.
The purpose of this sleeve is to reduce the flex in the subframe under load with the diff brace installed, you can now tighten the single upper bolt to 35 foot pounds of torque.
Pre existing customers with the diff brace just pay for the shipping.
Thank you for your purchase & look out for more products in the near future.