Anyone have personal reviews on Speedway's exhaust or intake parts?

[Matt300ZXT]

I'm looking at their intake manifolds for 2 or 3 carbs, and their split exhaust. Anyone used these before? Looking for some pros/cons to using them. I'd love to have Fenton, Offenhauser, or Clifford parts but if these parts are of similiar quiality and performance then naturally I'd rather pay half for the same stuff.

Oops, just noticed on the pics of the intakes they do say Offenhauser, but the exhausts still don't have a name brand on them. I'm favoring Cliffords but still keeping my options open.