Quote Originally Posted by Matt93SE View Post
It's no worse than the inside of the braided steel flex sections... Actually, it may be slightly better since the corrugated stuff is mashed into an oval-shape corrugation. it's not nearly as rough as the inside of the braided type.
Did anyone say that the braided flex sections were good?

I think those two things combined really leave a lot to be desired in terms of flow. I can't see how an internally corrugated pipe would be worth it - but I have no data to support that theory, I would never even have considered in a viable option in a test.