Cheers I didnt even know that. The cops were factored into my asking the question, I know off the turbo is the best option for improving its breathing but I was tryin to stay away from the pod being exposed (cause I know that is illegal). Since I now know that the Herrod box is still illegal, it's at least concealed and the less car savvy coppers might overlook it. So I guess its more of a question what will improve airflow the most? The Herrod or cutting a giant hole in the factory box and sticking big snorkel on it.