it doesnt replace the stock cover it goes over, it is aen egnine cover...it really is only good for keeping the heat from the engine in place(which may not be a good thing) and for looks.
Also if you have like a Wings West hood that has the openings in it these covers are nice cause u can remove the plastic ones off the hood so the engine can dissapate more heat and the cover protect the wires and plugs and stuff.
Basically it looks similar to the ones on the mp3's but in C/F