Thanks Ruffstuff for he reply. Thought I read somewhere that the EGR cycled on dpf present tune but I wanted to make sure. As far as a hollow DPF, how much does that cost?
Here is the info from the H&S website:
"When running DPF PRESENT tuning, it is required that all sensors located in the exhaust system stay in place and plugged in, otherwise you may experience a Check Engine Light (CEL) and even a loss of power (limp mode).
When running DPF REMOVED tuning, it is recommended that all sensors located in the factory exhaust system be unplugged from the electrical harnesses. These sensors can also be removed completely with the factory exhaust if desired. On the 6.4L Powerstroke, there are usually 2 EGT Sensors and 1 Pressure Sensor.
Note: The vehicle will not run with sensors removed unless DPF REMOVED tuning is installed.
When running H&S DPF REMOVED tuning, it is not required to unplug or block-off the EGR system on your 6.4L Powerstroke to disable it. The EGR system is already disabled in the tuning and will not function under any conditions. If desired, the entire EGR system can be unplugged, blocked-off, or completely removed when running H&S DPF REMOVED tuning."