In order to combat this rise in temperatures, your engine is equipped with numerous coolers. Unfortunately, most of these coolers are built with a top priority of minimizing cost, meaning the overall performance and capability suffers.
One of the best upgrades we have experienced on some of our own EcoDiesels is upgrading the intercooler and intercooler piping. Especially with a little tuning, the turbo is really wanting to produce additional boost and airflow, but is severely restricted once it hits the factory piping and miniscule intercooler inlet. You may not be aware, but the drivers side intercooler piping even has a large resonator built in, which really bottlenecks airflow.
By increasing the diameter of the piping, eliminating the factory intercooler pipe resonator, and installing a more efficient intercooler that features larger end tanks, you can really let the turbo breathe, resulting in an increase in power and efficiency.