These are the things it does to promote flow and prevent terbulance that other hotsides I've seen don't have.
- Very short overall pipe length
- Less bends (270 degrees total)
- Shallow pipe bends
- Wide charge pipes (2.5")
- Smooth/gradual transition from turbo outlet size (approx. 1") to final charge pipe size
Vadim mentioned the one thing that could be improved (I agree) would be to not have it run above the exhaust manifold (heat soak). I have a heat shield on the manifold so that helps some.
All the other hot sides I've seen have long pipe runs, smaller pipe size (2" and smaller is very common), very tight bends especially those with turbos clocked "down", many more bends than mine, and harsh transitions from the turbo outlet size to the final charge pipe size.