Without seeing the cut out , the top one looks more H to me - the bottom one seems like an X though .
In the real world, it really doesn't matter.
Looks like Some X pipes are more pronounced in blending gases more smoothly then others . I saw a video of flow that demonstrated - I have the top X and 2 cats on it and plan to use 44s or maybe super 40s ( original 40s are known to drone hard )
Don’t know if anyone could answer this - What about as far as sound - will the top X exhibit more of a H rumble or x rasp with flows
Don’t let anyone fool you . All the flows and most chambered mufflers In general drone.I suppose the FM super 40s will be a bit less drone and not as loud as original 40s ?