The undertray on modern cars is there for aerodynamic reasons, not just to keep engine bay clean.
Smoother airflow under car = less turbulance = less drag = lower cdi.
Also:
Smoother airflow under car = faster airflow under car = lower pressure under car = improved roadholding.
This is why race teams spend so much time on the underpanels; "aero parts" are ofter underbody diffusers etc.
In the extreme, some race teams in the 70's put side skirts on the car which would brush the road, increasing the "ground effect". STP even stuck a bloody big fan on one to help suck it onto the road! All this was considered unfair. This is part of the reason behind the minimum ride height in F1 cars today, and the bit of wood that has to be on the bottom of the car to prevent them being to low.....
I have a brand new one, but haven't attached it 'cause it doesn't fit with the aftermarket front bar. I have a solution for that, however...
For me, I chose to keep it off so I could monitor and check for leaks.
Having it off is fine, even in heavy rain.
can some one post so pics of one?
might get one made up out of aluminium
Which clips are they? Do you have a part number or photo? I've got the clip that uses a central philips-head. Bit of a PITA.
Haven't run with the undertray for almost 2 years now but will consider placing it back.