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How to retro-fit skid trays, aerodynamic under trays, & stone guards to a MK7 Golf

southpawboston

Drag Racing Champion
Location
Somerville, MA
I don't think there is any issue with heat escaping but I'd have to do back-to-back testing to verify.

That exhaust tunnel cover won't fit without modifications. I use the short one.

That rear cover won't fit awd models.

Only other piece is the subframe cover.
Just FYI when I switched to the full-length belly pan (with front air inlets) I noticed a ~5-7 degree F increase in oil temp for my 1.8TSI on long drives on hot days. Not a big deal, but the pan does trap more heat.
 

tigeo

Autocross Champion
Just FYI when I switched to the full-length belly pan (with front air inlets) I noticed a ~5-7 degree F increase in oil temp for my 1.8TSI on long drives on hot days. Not a big deal, but the pan does trap more heat.
I don't recall any changes but easy to test out.
 

tigeo

Autocross Champion
This picture suggests it's getting out. I didn't have the subframe cover at this point:

A93A6766.jpg
 

Aarodynamics

Passed Driver's Ed
Location
Seattle
Car(s)
2015 Mk7 Golf R
This picture suggests it's getting out. I didn't have the subframe cover at this point
That definitely looks like a decent amount of heat under the car (hard to say though whether that’s exhaust or engine though, right?).
Are you running the full belly pan at this point and thoughts on using the fully belly pan on track if you don’t have additional cooling?
It’s just not clear to me how the hot air escapes if you have the full belly pan… is there still plenty of room at the back of the engine for it to get out?
 

tigeo

Autocross Champion
That definitely looks like a decent amount of heat under the car (hard to say though whether that’s exhaust or engine though, right?).
Are you running the full belly pan at this point and thoughts on using the fully belly pan on track if you don’t have additional cooling?
It’s just not clear to me how the hot air escapes if you have the full belly pan… is there still plenty of room at the back of the engine for it to get out?
Yes, I run the full-length shield, subframe cover, and short exhaust tunnel cover. Heat would escape out the side into the wheel wells and out the exhaust tunnel essentially. You also gain some aero here so keep that in mind. My car basically runs the same temps on track as it always has with these on.
 

Aarodynamics

Passed Driver's Ed
Location
Seattle
Car(s)
2015 Mk7 Golf R
Optional Audi Cabriolet METAL skid tray,
This item covers the whole of the metal subframe. The Audi subframe is an "open web" design made in Aluminium alloy, so not as aero as our sheet metal "closed" design.
https://www.golfmk7.com/forums/showpost.php?p=662179&postcount=376

Parts sheet:-
https://audi.7zap.com/en/rdw/audi+a3+cabriolet/a3ca/2016-778/8/825-825000/#24

Note there are numerous versions of the tray (ie ducts)

Item No. 24:- 5Q7 825 235 A or B or C or D, skid tray
Item No. 25:- N907 371 07, Fillister head bolt with multi point socket M6x12mm (x 4) For front edge with bumper
Item No. 26:- N909 747 01, Hex socket head bolt M5x16mm (x7) for fixing the wheel arch side edges
Item No. 27:- N907 583 02, Hex socket bolt combi M8x25mm (x9) for the main nine.

I can't find brackets for this & think its a different style fit??

Haven't seen anyone mention the Audi MQB cabrio metal skid plate here, not sure if it would work on other MQBs tho

5Q7825236B\E
Did anyone ever figure out which brackets, if any are needed. for affixing the 5Q7825236B Audi aluminum skid tray?
I'm thinking this might be a good fit given I have the Audi aluminum subframe on my Mk7 Golf R.
Any downsides to it other than price?
 

StokTdi

New member
Location
Ohio
Car(s)
2015 Golf Tdi
Nice!


Aren't you missing the panel behind the right rear wheel?

This one;
5F9825102C

View attachment 263690
View attachment 263691

For your version of the fuel tank, there is panel (5WA201429) but then you would need to change the fuel tank strap to the one with a bracket (5WA201656) and I can't see a screw installed for the other mounting point on your tank, behind the mounting point for the purple panel in your picture.

You can see it here, between the rear axle and the fuel tank. Ignore the red circle...

View attachment 263692

Also, the panel behind the rear axle in the picture exists in some different versions, mainly on the Octavia. Don't really know if it works when you have an extra muffler behind the rear axle like you have.
Does there happen to be an equivalent to 5F9825102C for NA TDI Golf? Highly doubt it since we are the only ones to receive DEF but thought it would be worth a shot asking. I understand that 5WA201429 cannot be fitted without changing the fuel tank.
 

shorty_cz

Go Kart Champion
Location
CZ, Europe
Car(s)
Golf 1, Passat 9
I saw the MK8 Golf underside awhile ago on a utube video.....& that metal cover I don't recommend as it will fit, but you have to cut your existing side panels..& we already have a MK7 cover...
Hi guys, sorry for jumping into this old topic regarding metal undercover from Mk8. I recently bought Passat B9 (I guess it is not available in the US) and when I finally bend and looked under the car, I was surprised by a rather low share of area covered although the producer is proud on low air drag of the car. Moreover, it is eHybrid and more aerodynamic would add to precious EV range (which is overestimated anyway) I guess

To skip the talking – Etka says that the metal cover 5Q0825230K is suitable for the Passat 2025. From the Golf 7, I remember that retrofit of comparable but plastic cover with aluminium layer was easy, cheap and served its purpose (at least my feelings). So: anyone retrofitted the full-metal version and observed some effect? Thanks and sorry for interference
 

Jachas

Go Kart Champion
Location
PL
Car(s)
A3 8V
Effect on areo and NVH should be same. Only difference will be when cover catches some small rocks (If you go off-road or on some dirt roads) Rocks jumping around metal cover will make more noise than on plastic cover with some metal plating on it.

I have metal one (was cheaper and easier to get than plastic with metal plating) and it's doing well.
 

southpawboston

Drag Racing Champion
Location
Somerville, MA
Just a word of caution: I installed the full-length belly pan a few years ago, and when I removed it to replace what I thought was a faulty oil level sensor, I found that a squirrel had attempted to make a nest inside it (there were acorns stored there to prove it!). The insulation on the pan makes a nice, soft bed for critters, it turns out. The sensor was fine, the squirrel had chewed through the sensor harness. I'm guessing if that belly pan wasn't there, the squirrel wouldn't have nested there. Just a data point...
 

shorty_cz

Go Kart Champion
Location
CZ, Europe
Car(s)
Golf 1, Passat 9
Well I am nit that afraid of squirrels since thos for the EU market are much smaller thus less courageous than those assembled for NAR 😊

But it makes sense that metal plate could ultimately increase noise rather than reduce it and it would make me angry since I paid extra for some factory fitted noise insulation pack (I guess just double-layered windows)
 
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