will the engine sound different if you install it incorrectly? I would think that there would be only one way to install it too, and that as long as it was installed correctly, it would automatically be under the cam. Maybe not EXACTLY under the cam but at some point it would. I think I got it close the last time I installed it but the van's been sidelined so long that I wouldn't remember what it sounded like before hand. And for all I know it always sounded like that I just wasn't paying attention. Pain in the ass...