X & H pipe vs straight dual exhaust

Lelo Dart said

http://www.fullboarperformanceexhaust.com/servlet/the-108/Stainless,-Steel,-SS,-Stamped,/Detail The best type of X with no restriction, IMO.

Click to expand...

what?

those look nice but no restriction is bull,they are just easy and cheap to make,look into one of those and you will understand the problem.