i'm not knocking externals WGs at all i'm just saying the way majority of people scream for externals WGs it makes it seem like the internals are junk...for majority of people internal WGs are fine and that's why I think no one has developed any true piping for externals, not enough a market for them to do so in a mass production world. there area few people with the know how and the capability to do it and they have done it for their cars.