So I decided to make the switch from an O/R X to an O/R H. Talking with another member on here, he talked me out of getting the JBA O/R H to replace my X. Swap seemed like it would have been easier. I would have been sadly mistaken.
First thing I noticed when I went to remove the X pipe was how badly it was rusted. I mean there is rust, and then there is ruuuuuust. My stock parts faired better than this JBA garbage. I am not sure how much longer it honestly would have stayed on my car. The bolts that connected the cat deletes to the headers practically fell apart. It was bad. I had to use a stripped bolt remover on a few of them because they were rusted so bad they didn't fit the 15mm socket anymore. They were smaller from rusting so much.
Also I'll get a picture and throw it up but the pipe also when removing the one 02 sensor, the bung started breaking off metal and stripped the outter most threads of the 02 sensor. The metal from the JBA pipe is still on the 02 sensor. It is obvious it wasn't put in wrong as if it was all the threads would be stripped. So now I have to buy a $46 02 sensor to keep from throwing two CEL codes anymore. Also had to go buy 2 M18-1.5 plugs for a transmission drain to plug the holes currently. Gonna attempt contact with JBA and see if they will do anything, I am sure they won't.
As for the lethal, build is spot on. One thing people always noticed was that my axle backs stuck way the hell out the back of the car, no longer with the lethal do they do this. Looks like that was because the JBA was nearly 2" longer than the lethal. Also the bolts that came with the lethal pipe were much bigger. 16MM heads and the bolts themselves were much bigger. They fit the holes of the H pipe and the headers much better. A much more secure fit. They are also stainless steel bolts which will help in durability. The other bolts I forget what they were, but they were crappy.
So now to the part everyone is going to want, comparison videos. A quick note, the H pipe while also deeper, which is hard to tell from the videos the absolute rumble it has, also creates a clearer sound of the RPMs. The higher RPMs you can actually hear, vs the X kinda meshes the sound into a blob of just noise. You can tell what I mean from the video. I will never buy an X pipe again
2011 Mustang 5.0 with JBA O/R X and Borla S-Types - YouTube