One thing to consider with litespeed is that they're using a one way valve instead of a pcv valve (they're not the same). I'm not saying this is a problem but it's something to consider. I suggest reading the last couple pages of the thread I linked in post #10 if you're thinking of going with the litespeed kit. Talsnic has raised some interesting technical questions regarding that setup in that thread, but of course he's being drowned out by all the people who purchased the litespeed kit (people defending their purchase
).