It looks well made,, and the vertical fins should do a good job of extracting heat directly from the cylinder head, but I question other parts of the design. The directional fins require airflow to be precisely front-to-rear for proper cooling, which cannot be guaranteed if the engine is shrouded by a body shell; airflow within the body shell is turbulent, even with ventilation ports cut into the shell. Also, the solid top plate will restrict airflow a little bit as compared to having an open top, for no obvious gain.