Just saw your thread for the first time. Very interesting place to say the least.
You've mentioned the sand in other threads and the damage it does. And I see the sand storms in the earlier pics here in your thread. There is a
severe duty filter and intake for Ford Supderduty and my Excursion for your environement. Have you had to upgrade your air intake filter? Does anyone offer a severe duty filter upgrade like that for the E53 let alone the 4.8iS?