improving aerodynamics with OEM parts

[Duke]

Getting the front tray fitted to mine very soon :)

[mkviken]

did mine last week and while i had the car lifted cleaned the underside and suspension parts thoroughly

I'm hoping this under tray helps keep things cleaner

[timmyed30]

I've read this all a copy times still not 100%
Is its worth getting these extra panels under the car!
What sort of cost are you looking at?
And are you getting and noticeable gain fuel handling speed????

[the bruce]

yes, worth it
< 100 pounds
yes, if you drive some motorway

[mkviken]

the front under tray is certainly worth the £30 as the OEM one is useless. the bigger one covers the whole sump and gearbox and protects the subframe a lot more

I'm going to try the exhaust shield and tank shield also just to keep the underbody clean more than anything

[the bruce]

Tank shield is easy on late model Mk.Vs as these already have the thread on the subframe tube.
I'd never fit the center exhaust shield again on a GTI as fitting requirers some cutting on the plastic shield.

Just do engine bay cover + tank/rear axle. 

[mkviken]

i have a non resonated system so don't think mine would require much cutting

[the bruce]

Ok, I didn't know this. Then it's easy.

[djhorace]

Great read - took ages though!

I am going to order the whole kit. I am a little confused at all the part numbers though. I am assuming this is all I need? Is there anything for the Leon Cupra R rear diffuser and side skirts too?

Extra lumps 1K0 825 001 B x1
            1K0 825 002 B x1
N 909 591 01 fixing kit   x4
N 103 546 02 fixing kit   x10

the 4 are little push on metal clips to allow the screws to thread into (like you see to hold speakers in place, and 10 are scews with washers.  The lumps are about £5 each

This is the rest of what I ordered

Full VW Golf Engine under tray
(x1) 1K0 825 237 P Undertray £26.24
(x3) 1K0 825 951 Hex headed bolt (Combi) 80p each M6X20 hex socket head bolt

Rear axle cover as fitted to VW Golf bluemotion
(x1) 1K0 501 713 D Trim for Rear Axle £25.03       3C0 501 713
(x1) 1K0 501 682 Retaining bracket £1.67
(x1) N 905 483 05 Retaining bolt 47p
(x1) N 901 838 02 Retaining bolt £1.63

Rear arm covers from Audi TT
(x1) 1K0 511 539 E Stone chip Guard £4.69
(x1) 1K0 511 540 C Stone Chip Guard £5.91
(x4) 8E0 825 267 A spreader rivet 10p each
(x2) 1K0 609 734 C brake cable clamp 76p each
(x2) N 102 854 02 Bolt 18p each

[Duke]

Had the front tray fitted this morning. It is a little bit quieter but the main reasons I added it was to stop so much crud getting in underneath and also for stability on track days :)

Not bad for £50 odd fitted.

[mkviken]

i got mine new from snoopy on here. took 5 minutes to fit and I'm sure it kept the underside a lot cleaner

I've noticed oil temperature is 2-4 degrees c higher though but otherwise its fine.

[the bruce]

I've noticed oil temperature is 2-4 degrees c higher though but otherwise its fine.

Some advantage at this season. It also might 'hold' the temperature for not-so-long stops.

With the larger cover my summer peak temperature was 113° C - so not any problem at all.

[mkviken]

well mine gets nowhere near that so i guess its fine. mine is usually between 100-105 degrees depending. i guess the freezing cold UK has something to with that.

[djhorace]

Sorry to be a pain - using my iPhone when travelling. Are the part numbers I listed above the correct ones?

[bacillus]

Sorry to be a pain - using my iPhone when travelling. Are the part numbers I listed above the correct ones?

Yes but ignore the 3C0 501 713 item.