I have to respectfully disagree with you on this based on a few quick observations you may have overlooked.
Brand X EBAY part:
- either really bad stacked tig welds or mig welds polished?
- unsupported brackets at the x section, with very little welded suface area or triangulation. High chance of cracking or bending
- misaligned piping at welded joint
- x mount tabs are uneven and or bent uneven by large margin
Challenge X pipe:
-precision hand tig welded x section
-laser cut and formed mount brackets with triangulation and larger welding surface area
- no break in piping, continuous.
We put in alot of time to make sure we coulde make a quality product in the USA and design brackets and components that will stand the test of time on the street or track without missing a beat. I hope this highlighted a few small things at a glance.