Anyone have experience with hedman 4.0 headers?

[1991 Blue danger ranger]

I'm looking at 2 headman header kits for my 1991 4.0, and there's one set that says its only for the 93/94 4.0 (part number 89400), and another set that says it is for the 90-94 ranger (part number 89406) . they both say they work with rwd and 4x4s. my issue is that the 90-94 specific one is 200 more dollars on jegs, and i really cant see the difference between the two. is it the y pipe??? i know the stock manifolds are no different throughout the pushrod 4.0 until 97, but otherwise?? please let me know if anyone can figure it out, thanks!!

 

[SenorNoob]

That would be my guess. Up to 92 usually has one O2 sensor just before the cat. 93+ usually has 2 O2 sensors right after the manifold on each side.

 

[1991 Blue danger ranger]

That would be my guess. Up to 92 usually has one O2 sensor just before the cat. 93+ usually has 2 O2 sensors right after the manifold on each side.

Oh I see, yeah i've only got 1 o2 sensor. I sent an email to hedman to ask what the deal was, if its something as minor as that then I couldn't care less, cut it out and weld it flush haha. thanks!