http://hellmannperformance.com/12%20...20manifold.jpg

anybody using this product?

 

I haven't seen anyone using that manifold, but my first question is .... why isn't it a multi-piece unit to address stress cracking?

 

Excessive expansion and contraction during normal heat cycling is really only an issue with cast iron. Most typical steel alloys do not typically have these issues so there is no need for integrated expansion joints.

 

hows the flow? even the oem has some sort of direction of flow (if that makes any sense) it just looks restrictive. if i'm wrong correct me. i'm not downing the product just my first impression.