Jesse_01
New member
Theres one place that had a replacement down pipe. Considering that nobody else makes one, I don't think they are a limiting factor on our trucks. Plus with the DPF/SCR system, I think every bit of emissions is in that section, so the down pipe is just a tube.
There's always meth if you want lower egts.
I never looked too closely. I thought the 6.7 down pipe might be similar to the 6.4. Double walled and squished together.