Im looking for some advice on how to make the part below and mould?

First off... do you know what the back side looks like?   The "thickness" seems to me to be a different part then the metal cover?  some of the engines I've seen with cam-chain covers use a fibre part against the engine block + a thin metal cover on top of that, usually the "fibre" part has cutouts to leave room for the internal moving parts..

You really need to remove the cover and take a closer look at it .. you may well have a more complex part than just a flat  8 mm thick cover ..

I have managed to make quite nice cosmetic parts (End caps for Bike exhausts + exhaust shields) with the EC high temp resin ..

It need a "stepped" postcure to reach the 180 degree Tg ..  this can be found on the sheets for the EC resin.

"Sapere Aude"... Dare to KNOW!

The written word is the only truly efficient vehicle for transmitting a complex concept from mind to mind...

103% of all people do not understand statistics...

Do not adjust our mind, theres a fault in reality :-)

On the back side of the part it has a 1mm recess, but i can get away with not needing that on the carbon part