I've fitted this aftermarket wheel arch liner, and I'm somewhat happy with it.

 

 

But I don't like this gap that it leaves behind the fog lamp.

 

 

I've knocked up this very rough template to fill this gap.

 

But I need some advice on how to make this in a harder material, preferably in flexible plastic. I don't know if there is something out there that I can dissect to make fit, or whether I will have to manufacture it somehow myself.

Edited 12 November, 20232 yr by R_U_AFA

 

I have them too.

You could add some insulation behind it, would help while you are rolling in highways to restrict the noise.

Lexus does it from the factory.

 

Why you must cover it?

 

12 hours ago, R_U_AFA said:

But I don't like this gap that it leaves behind the fog lamp.

 

You can keep this and make a mold for polyester.

 

To me it looks like it's half finished. On most modern cars this bit is also covered by the undertray.

 

I been thinking maybe trying fiberglass

I found a photo from my archives, here is mine.

 

 

Another one.

It's like yours @R_U_AFA.

 

 

I've found some liquid latex, that I should be able to brush on to my template to make a new undertray to fit the gap. Although I'm not sure about the strength or flexibility of latex.

Since mine looks identical to yours why you want to make that cover? Aerodynamic (Ground effect) ?

As is now you can work in the for light area (changing bulb etc).