I looked into the major difference between the Speed Daddy & APN.

It's material... where you get what you pay for.

However, 304 vs 321, assuming they used a thicker wall tube 304 is worth the cost savings in my mind. If not then the header will crack eventually. I'll "waste" a 100 bucks over 180 to find out though... Speed Daddy, non-coated, it will be for me.

 

That's one I got the Stainless and my bud on his 98 he hasn't had any problem with it, but also swaped out motor mount to the brown dog. The review for the speed daddy were pretty good with little neg, most were that it didn't fit but that prob because they want a no mod fit like the banks or gibson, or any of the other higher ends brands.
The only problem I ran into with mine it that you have to grind quite a bit off the number 6 runner to fit, and had to dent the pipe a little but other then that wasn't bad.

 

The pics. Feels a bit heavier than the one that was in there before. After install I got a little more torque but not sure if it was a combo of cleaning out the intake, changing to 4 port injectors, or lack of exhaust leak. So far I'm happy after 72 hours.

 

Just looked at the second picture. They are roughly the same size, pic makes them look different sizes. Same size lol

 

My Flow Daddy Just Showed Up:



Looks Great 304 SS

 

That's how mine looks now lol that "ceramic coating" came right off. Good luck with install

 

ATP is APN. When I got my APN header the box said ATP.

http://www.ineedparts.com/apn-jeep-e...-manifold.html

 

I thought i read they changed their name

 

I was mad when I got mine because I didn't know they were one in the same and when I ordered my header online it was 40 bucks cheaper on Amazon under ATP. But I didn't know so I ended up getting the more expensive APN