Yes don't mention this so called tuner and give them business. Cobb doesn't even support the Ranger so why post that link. So many "professional" Ecoboost Ranger tuner experts on this page! ??? I'll trust what Livernois says over random people on here! ?
Again, Livernois said there really isn't any tuning you can do downstream. They're a tuning company I'll take their word for it. When people say it's tuned for it it was prob before epa cracked down. Aka they were able to shut off the rear cat cel from happening. Either way NOBODY can do...
Just saying what Livernois told me numerous times. They said there really isn't anything to adjust with exhaust mods. I've seen many posts of people not even having any sort of tune running them.
You don't need a tune with a Downpipe... It's a speed density engine. At least that's what Livernois has told me numerous times. You will need a type of defouler for the downstream O2 sensor though so you won't get a cel due to the freer flowing cat.