Quote from RS1T :

just finished perfecting some begginer setups for the XRT and RAC. These setups arent designed to give quick lap times, they are designed to make driving rwd cars easier for begginers, and for them to improve their racing technique and perfect their lines. they grip much more than the standard set ups but the have a little less power

why i can not use XRT set when i choose XR GT TURBO. it hasn't display on right corner.