is there a manifold off any other audi that will bolt right onto my 1.8t quattro sport that would be a performance gain?my standard one is cracked and i need to do the manifold to head gasket so if there was an easy cheap upgrade now would be the time to do it.i have seen pictures on here somewhere of a cast manifold that was like standard just slightly bigger tubing and looked like it would flow better.anybody got any info?