i have been away for a while and haven't heard the latest on the diablo predator. i have my predator ready to use but would like some opinions first.. i would like opinions from those that have actually used them.. good or bad and why would be great.. i don't really want to lose mileage but don't really care if i dont gain any either.. later i plan to add a new muffler and the ram air hood and CAI that comes with it.. thanks