Exhaust ?

[CBHATCH250]

hello everyone! I'm doing a DPF delete and I'm going with a downpipe back straight pipe exhaust.
I have a 2015 250 that is completely stock. This will be my first upgrade.
My question is do I go with the 4" or 5" system and why? Thanks!

 

[eZAK61]

It all depends on your intended use of the truck.

Read this article first;
http://www.hardworkingtrucks.com/about-dpf-delete/#

A DPF delete shall also include preparing your truck for the track or off-roading ONLY!

 

[powerstoked]

first, this will be illegal with a hefty fine if pulled over and checked. If I was to go that route I would definitely go big, as you want to let the gas out fast. I have a LB Crewcab so the added length creates more pressure. I also fiberglass wrapped my up pipes and down pipe to help speed up the gases.