<p>This is one state of the art piece...<br /> Can you imagine a very resistant cylinder/cylinder head set, with excellent manufacturing and with a superb performance?<br /> Well... you don't need to imagine it... This is the piece you are looking for!!!<br /> As it is build in one piece set, there is no air leakage at all.<br /> Another must buy item, especially if you're looking for an extreme upgrade.</p>