Are you going to run the stock paper filter or replace it with a drop in unit like a K&N? What are the race teams running in their cars? Here's some info on the K&N for the GT. Does the Boss use the same filter as the GT?
http://www.americanmuscle.com/kn-dropin-filter-2010.html
![mustangtuning_2153_54050010](/proxy.php?image=http%3A%2F%2Fep.yimg.com%2Fca%2FI%2Fmustangtuning_2153_54050010&hash=990f41e2ecf85b3b5535cc17dd1ddc15)
http://www.americanmuscle.com/kn-dropin-filter-2010.html