i'm thinking of removing the gearbox undertray as i noticed h2dae's doesnt have one ,would it help the air intake or just suck up water ,also would it cause intake problems as the car speed increases. my kit is different to h2dae's i have a cda based kit f19i

it helps keep the muck out, and prevents stones and stuff flying in there and derailing your cam belt, which on a jtd = disaster


it also helps keep the wind turbulance and noise down at speed (70+), so removin it will make it noiser, slower, easier to be 'caught' by the wind, and may affect mpg

of course, thats if there is one under the whole engine bay

undertrays are great, why on earth would you want to remove it?

air intake would not be affected really, unless the gain/loss of air pressure in the engien bay affected it slightly for better or worse, but nothing noticable.

main thing to think about is preventing dirt from entering the engine bay. thats well worth keeping it for.

guess i'll leave it on, its only under gearbox not the engine

Got any pics? Wonder why mine doesn't have one...

mines an 03 dynamic maybe they only put it on later cars, although my jreg tempra had a rear undertray my bros n reg didn,t . will try to get pics; its dark when i finish work though

its quite regular for garages to remove them, then either break them or can't figure out/not have time to... refit them

go to your local garage, I'm sure they'll be a pile of undertrays from various cars

lazy bums. On our audi when it was 1 year old they removed the undertray, then broke the tabs (broke 5 out of 8!) so it couldn't be refitted. Got it home, and its like, where the hell is the undertray!!! so spent nearly an hour driving back in the dark along the roads we had been down that day trying to find it.

turns out they had broken too many tabs to refit it, so instead of saying something (even though its quite a feet to break so many on a new car!) they just thought they'd get away with it.

faster4_tec said:

its quite regular for garages to remove them, then either break them or can't figure out/not have time to... refit them

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true, mine was destroyed when removing it a few months ago

Maybe it's a weak design, they seem to be on Stilo's as my Dad's came off for no apparant reason, and also my friends (also Stilo owner) had one part coming off.

what holds them on (usually) is a little plastic screw lug thing, that turns thru just 90 degrees and latchs on.

it doesn't take much of an impact for these to break, come loose, mountings break.
also vibrations can shake them loose.

IMO they are usually crap, the audi ones have springs in them to keep the tension, so the ONLY reason an Audi/VAG one would come off is because its been whacked, or some lazy monkey can't figure out how to turn them 90degrees anticlockwise then catch