FR ST exhaust upgrade to Cupra R

[jellybaby82]

Morning guys.

Im looking to upgrade the standard FR exhaust, the the Cupra R system. Ive already got the system and the rear valance, however ive noticed that there is an under body trim panel.
Ive had a look on CarProg2 to see if I can find part numbers (5F0825189) but none 'appear' to be for an ST. Does anyone know if one exists, or if the hatch fits the ST.
TIA

 

[Miguel 7]

The stock exhaust from the R doesn't sound that good to be fair.
Wouldn't it be cheaper to get a custom?