Important: The installation instructions are not included in the retrofit kit. Print out the latest installation instructions from the Aftersales Assistance Portal (ASAP) and issue to the customer. In Australia the 20" wheel arch flaring is required so that the aerodynamic kit can be fitted.,Important: The installation instructions are not included in the retrofit kit. Print out the latest installation instructions from the Aftersales Assistance Portal (ASAP) and issue to the customer.