Yeah and a MagnaFlow Y pipe but that probably doesn't make a difference.

 

Okay, and your running canned tunes?

 

Custom ones from MPT. My DD tune is just an 87 performance tune with the chill transmission setting.

Mpt has accounted for the new tires and they deleted the rear o2s for the cat delete.
The top end of my engine is pretty much stock other than the gotts mod but I have driven with and without it and it didn't effect the WOT issue. And efans but that didn't effect it either

 

If they are custum it depends on the tune. Go back to factory and see if there's any difference. With that set up it should run good on the factory program. Yea that isn't too much flow, so you can check to see if the tune went buggy by loading the factory tune.

 

I'll go out and test it tonight. I'll do 3 pulls I do one with my DD tune from MPT, one with the canned SCT tune with the rear o2s turned off and the tires accounted for, and one with the stock tune. I'll take videos of all of them for you

 

I have more than you do engine wise and running 3". It's a little doggy from idle to about 3500. But it make all its torque at 2600rpm and holds it to we'll over 4. It's just the nature of the 5.4

 

Mine feels almost gutless until about 2500. It's more the slow swinging or the rpms from idle to 2500 that worries me.

 

Keep in mind your upstream cats are more restrictive than the rears were (some think the opposite).

If the exhaust is tight and you still have the downstream O2's connected, you shouldn't get a CEL going back to factory settings. You should still be within margins of the factory programmed parameters. But yea, as long as the exhaust Y is tight ...leak free.

 

We cut out the o2 bungs with the rear cats that's why mpt turned off the 2 rear o2s. I'll have to check to see if I have any leaks. I don't hear any tho

 

Don't worry about then, unless there's no denying lol. You'll get a CEL though unless they have been weeded out of the factory tune.