There are several threads about cattmans Y-pipe flex section collapsing to a very small hole, and of corse there are many complaints of leaking, hissing and buzzing flex sections from different y-pipe manufactures. It seems Warpspeeds lined flex section is the best so far, with no problems that I have seen.

The factory Y-pipe has a flex section on it and I never hear of that one failing, buzzing or leaking. Why can't aftermarket Y pipes use the same design?