I need you guys with longtubes to please measure from center of collector to center of collector, I have a mid pipe that doesnt fit my 94 5.0 and think it may be for a mod motor
If it has any O2 bungs at all on the h-pipe, it's for a 4.6. With longtubes, the pre-cat bungs would be in the collectors, but on the OBD-II cars (96-04), there should be a second set for the after-cat O2 sensors. They'll still be present, even if there are no cats in the pipe itself.