Mark - i put it in - not 100% sure of any performance gains - but got the bling factor ON like Donkey Kong...
Main issue I had is with the bottom hose - needed a lot of "english" to get it aligned and fitted it was not as simple as the plastic one because the bottom pipe is not in the same place. ALSO, a complete pain the arse is the bolt - can not fit a socket on or a ratchet ring spanner because of the size of the thing - so traditional ring spanner #10mm is to be used.
Otherwise that is all...
"The difference between stupidity and genius, is that genius has its limits." - Albert Einstein