Straight pipe
John, you have no idea what your talking about.
This is why your being taken to task.
Cats in good condition have more than enough flow capacity to be used on a 4.6/5.4L motor.
It's nothing to do with back pressure. Back pressure is never a performance enhancement.
You just want to make noise, go do it and be happy with the results.
This is why your being taken to task.
Cats in good condition have more than enough flow capacity to be used on a 4.6/5.4L motor.
It's nothing to do with back pressure. Back pressure is never a performance enhancement.
You just want to make noise, go do it and be happy with the results.


Now I have:


I have had that Magnaflow muffler on for over 2 years now and I am going to have it exit in front of the passenger side rear tire soon. I go back and forth on what I want to do and how I want it to exit all the time. As of now I want to exit where I said and then swap my 4 stock cats to 2 high flows for more volume.



