Front engine bay reinforced skid tray with one duct (required for the DSG or for extra cooling) as per mine.
Item No. 23:- 5Q0 825 902C, Underrun bar with one duct (Skid tray),
Now called in USA:-
Item No. 23:- 3Q0 825 902, Underrun bar (Skid tray)
The reinforced skid tray requires the following hardware to fit as per factory:-
Item No. 24:- 909 747 01, Black wide head T-star screw A04B, £0.16 (x7)
Item No. 25:- 019 530 7, Flange hex head bolt (M8x25mm), £0.93 (x7)
Item No. 26:- 5Q0 825 921, Retaining bracket, £6.98
Item No. 26:- 5Q0 825 922, Retaining bracket, £6.98
Item No. 27:- 907 559 02, Spline head bolt with washer, £1.14 (x2)
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The thin plastic aero tray:-
5Q0 825 236Q gives you two ducts/vents near the front
3Q0 825 236 give you an additional baffle grill at the rear ....(used on GTE)
Item No.10:- WHT 000 729 A, hexagon socket head bolt, self-locking,(M8x20mm), (x3) shorter than the skid tray rear bolts as the "Aero" tray is thinner plastic
All are full size trays & require the rear three bolts, but do NOT require the brackets or front bolts due to the light weight, they also use the existing small black screws...
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I don't know what your car has fitted but usually they don't have those extra trays (front & rear exhaust tunnel covers) fitted. It won't have the MK8 aero covers for the lower rear arms !