Originally Posted by Wandell
I agree. The OEM intake is a really good design. The OEM exhaust is also really good, except for the DPF/NOX. No need to waste money on a CAI or a DPF-back exhaust.
With that your best investment is an H&S Mini Maxx (race version) or XRT pro + a 4" turbo back exhaust. Diamond eye is a good cheap alternative.. I have their 4".
Fuel economy will go up 3+mpg and EGT's will be lower (that includes egr unpluging) and power will be up to help with towing.