Maybe this was to be expected but I've just got my Hooker LT's with the Hooker cat back on, I was on the stock manifold. The 6# Powerdyne was on the car when I bought it so I'm just learning about SC's. Before the headers I could get at least 5#'s at times 6#'s. Could I put a 9# pulley on and be safe? What would my boost loss be? Now before everyone tells me to dump the PD because it's crap, that's not going to happen, as long as it keeps running it will stay there.