i know FI type manifold can have poor performance on N/A setups but does the reverse create the same result for FI type?

I was looking at soem skunk 2 and custom manifolds and can't see why they wouldn't work well in a Fi setup.

Anyone with experience?

 

I don't know what you've been reading, but manifolds aren't made for NA or FI. They're made for a specific powerband in mind. Long runners vs short/straight, etc. The only NA mani that'd be really bad to use with FI is an ITB manifold

 

regaurdless of what they're made for,
the oem manifolds can be a restriction if you're pushing a large ammount of CFM

so an aftermarket mani is going to be an improvement.
which one is best? i'm not sure, but I do see edelbrock mani's on alot of higher end turbo setups..