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

evilhomura89

New member
Location
SEA
Chillout has confirmed that this 3Q0 part number will not fit
The one that fits his Seat is the 5WA407117 and 5WA407118
You can see the difference here - https://www.drive2.com/l/579144661260567435/

I'm asking for his lower arm part number to see how different is it compared to the other lower arms used for the MQB platform
Dimension wise it should fit all MQB cars just fine - just that there might be some differences for the positioning of the holes on it which is confirmed by golfdave here - https://www.golfmk7.com/forums/inde...tone-guards-to-a-mk7-golf.320687/post-7574912
 

RaySkodaTSI

Ready to race!
Location
New Delhi India
So 5WA501713A will need a bit of trimming if your running an aftermarket exhaust. The bigger aftermarket pipes hit the left buldge of the tray. Once Trimmed it fits like a glove.
 

golfdave

Autocross Champion
Location
Scotland (U.K.)
Car(s)
MK7 Golf GT Estate
On my TTRS they leave the entire driveshaft tunnel and exhaust uncovered. There are also cooling fins on the rear diff / haldex so I'm fairly certain I shouldn't cover those up. But I like the idea of enhancing the LCAs.
I also purchased another right side rear cover for the left side as they are almost interchangeable. I'm doing that mostly for fuel tank protection as there are some nice "chips" in the plastic tank. I don't think it was left open for any kind of cooling but it's really hard to know why it wasn't covered. I suppose the left side fuel tank itself acts as a cover as it's flat but there is a gap between the side cover and tank. The factory exhaust also blends into the rear diffuser/bumper for decent flow.


The whole exhaust tunnel is left open (in your case) for a reason.....

There was a UK forum member earlier on in this thread that had a car like mine (2wd & one exhaust pipe).....& he made a custom full aero tray with some air ducts to completely cover the exhaust tunnel from front to back..

He removed it awhile later as he noticed that on long journeys the interior trim in the cabin on the tunnel was getting "warm"....

You have two exhaust pipes & one prop shaft.....leave it "as is".

However, I notice that you do not have the MK8 Golf rear lower arm aero covers...these will improve the aero & quieten down the noise in this area.

I also note that your car has the front arm air guides to the brakes & you have a full aero tray for the engine bay fitted...!!!


A few pages back there are part numbers for the "Eco" MK8 HUGE front engine bay tray which also covers the front subframe & works with the Audi Alu subframe which you should have.......word of warning...you might have to cut some NACA style ducts into it as its made for the "Eco" engines..so not much call for heat/cooling & therefore has no ducts....
 
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EVILAUDI

Passed Driver's Ed
Location
Madison, WI
I'm looking at the lower control arm covers. If I end up changing the exhaust I may also add the Verus diffuser which seems legit. If nothing else I can follow their lead to fab something similar up.
 

golfdave

Autocross Champion
Location
Scotland (U.K.)
Car(s)
MK7 Golf GT Estate
I'm looking at the lower control arm covers. If I end up changing the exhaust I may also add the Verus diffuser which seems legit. If nothing else I can follow their lead to fab something similar up.

I think somebody has done the Versus with the MK8 Golf lower rear arm aero covers....I think it worked ok without trimming of the MK8 Golf aero covers...
 

(R)Rated

Go Kart Newbie
Location
Rhode Island
Car(s)
2018 Golf R
I'm running the verus rear and mk8 aero guards. I did trim a tiny bit on the back end for clearance. It was many if the suspension compressed and dropped down it wouldn't clip the edge of the diffuser.
20210207_123151.jpg


20210207_130018.jpg
 

golfdave

Autocross Champion
Location
Scotland (U.K.)
Car(s)
MK7 Golf GT Estate
I'm running the verus rear and mk8 aero guards. I did trim a tiny bit on the back end for clearance. It was many if the suspension compressed and dropped down it wouldn't clip the edge of the diffuser.
View attachment 204252

View attachment 204251

Glad you replied.....I knew somebody had done it but couldn't remember if any slight trimming had to be done...
 

(R)Rated

Go Kart Newbie
Location
Rhode Island
Car(s)
2018 Golf R
Glad you replied.....I knew somebody had done it but couldn't remember if any slight trimming had to be done...
Just a smidgen lol. Gonna tackle the subframe cover (using your write up of course) and look at the front control arm covers next. At some point I'm going to look at making a panel that covers the open space between my gas tank.
 

golfdave

Autocross Champion
Location
Scotland (U.K.)
Car(s)
MK7 Golf GT Estate
Just a smidgen lol. Gonna tackle the subframe cover (using your write up of course) and look at the front control arm covers next. At some point I'm going to look at making a panel that covers the open space between my gas tank.

If you have the Audi alu subframe there is the big aero MK8 Golf cover which covers the whole engine bay & front subframe....but its not reinforced..& you need to cut ducts into it..


I just wish somebody did a nice rear tray for my estate to smooth out the underside of the spare wheel well...(bigger Passat has the rear exhaust higher up & the eco Skodas have the exhaust in a different place)......still have a few ideas to kick about...
 

(R)Rated

Go Kart Newbie
Location
Rhode Island
Car(s)
2018 Golf R
If you have the Audi alu subframe there is the big aero MK8 Golf cover which covers the whole engine bay & front subframe....but its not reinforced..& you need to cut ducts into it..


I just wish somebody did a nice rear tray for my estate to smooth out the underside of the spare wheel well...(bigger Passat has the rear exhaust higher up & the eco Skodas have the exhaust in a different place)......still have a few ideas to kick about...

At some point I want to get an aluminum front subframe. I am currently using an ecs street shield and tunnel shield. I've reached out to Aerofab and Verus on random post to see if they would consider it. Aerofab might be toying with the idea with their new "track" aero. I know they are making a rear diffuser like what I have.
 

Faceman

Drag Racing Champion
Location
Long Island
Car(s)
'17 GSW 4Mo
I just wish somebody did a nice rear tray for my estate to smooth out the underside of the spare wheel well...(bigger Passat has the rear exhaust higher up & the eco Skodas have the exhaust in a different place)......still have a few ideas to kick about...
I would be interested as well.
 

EVILAUDI

Passed Driver's Ed
Location
Madison, WI
Here is the under tray for the TTRS. It's hard plastic but easy enough to cut vents into if needed. The hole in this is from the factory it lets air in and that silver aluminum air guide forces it up to the cooling fins of the bevel box (AKA transfer case). I think this is mainly because it sits right next to the primary cat in the DP. The second picture is from the DP install and shows the positioning. It really makes me wonder how the air flows through the engine bay because that big old cat gets glowing hot on the road course.


 

Reggie Enchilada

Autocross Newbie
Location
WV
If you have the Audi alu subframe there is the big aero MK8 Golf cover which covers the whole engine bay & front subframe....but its not reinforced..& you need to cut ducts into it..


I just wish somebody did a nice rear tray for my estate to smooth out the underside of the spare wheel well...(bigger Passat has the rear exhaust higher up & the eco Skodas have the exhaust in a different place)......still have a few ideas to kick about...
Have you thought about just making your own diffuser? Sheets of 1/16" or 1/8" aluminum aren't that expensive. Fins would be nice, but might be a bit of a PITA to attach without a welder. A large smooth one would work well enough and without standing out too much.
 

golfdave

Autocross Champion
Location
Scotland (U.K.)
Car(s)
MK7 Golf GT Estate
Here is the under tray for the TTRS. It's hard plastic but easy enough to cut vents into if needed. The hole in this is from the factory it lets air in and that silver aluminum air guide forces it up to the cooling fins of the bevel box (AKA transfer case). I think this is mainly because it sits right next to the primary cat in the DP. The second picture is from the DP install and shows the positioning. It really makes me wonder how the air flows through the engine bay because that big old cat gets glowing hot on the road course.



I forget that Audi put big full coverage trays on their very low cars......you have a tray which covers the engine bay & the subframe...!!

As for air flow...air has to pass through the front rads...& into the engine bay..then it flows down the exhaust tunnel.....so I'd leave that tray well alone....
 

golfdave

Autocross Champion
Location
Scotland (U.K.)
Car(s)
MK7 Golf GT Estate
Have you thought about just making your own diffuser? Sheets of 1/16" or 1/8" aluminum aren't that expensive. Fins would be nice, but might be a bit of a PITA to attach without a welder. A large smooth one would work well enough and without standing out too much.

I'd want to do it in GRP or ABS sheet as its quieter for stone chips......but just getting specialist raw materials where I am is costly due to carriage charges...Th Passat ones use a pressed recycled felt type material like our rear wheel arches...I haven't seen a crashed one at our local scrap yard to take off & cut down to size...
 
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