Mine came without one (or someone already removed it). I haven't had any issues with the engine being too cold. The only real reason I could see having it would be to cut down on engine noise. If that is the case, like Superperk said, Dynamat makes some. Make sure you tell them that you are using it as a hood liner so they will sell you the correct matting. There is one that is lined, like the pic to insulate slightly.