If anyone has seen a turbo'd 8v RSI, i'd love to know a bit more!??!? As far as improving performance, i recently rebuilt the head, the head gasket went in style, turns out that the compression ratio is, for want of a better word, PANTS!!! i'm thinking that if i replace the pistons with those from a valver it should improve performance greatly! Question is do the valver pistons have flat tops?