Aires Quickboost has released a replacement for the Eduard series of 1/72 MiG-15 kits that replaces the kit air intake with a resin air intake. There are no instructions but this is a replacement for the kit part.
Quickboost has molded the air intake in light tan resin with no apparent bubbles. The Quickboost air intake is supplied on its own resin sprue with a thin resin attachment to the air intake. On my example there is some excess resin on the indents where the intake splitter fits that will have to be removed for the splitter to fit properly.
Although most paints will adhere to resin alone, I would recommend that you wash this part to remove any remaining mold release and prime it first. This part will need to be installed with your favorite CA (super glue) or epoxy, as the normal plastic glues or solvents will not react with the resin.