I did not manage to find anything. I think only greek seat offers this.
Here is are the specs;
Normal 1.4 Sport up (Seat force kit)
power 85ps 101ps
0-100km/h 12,2 sec 11,9 sec
top speed 172km/h 175km/h
torque 132nm 138nm
For the 1.4 version there is no much diference. In the 1.6 it is much better but i could not find any info.
All i know is the power has been increased by 15ps (120ps) and the torque by 6nm