406/Xantia Turbo>FMIC Pipe vs SS & Silicone

[silverzx]

I've got a Xantia turbo to FMIC pipe that I'm using to get from the inlet manifold as it fits nicely and has a boost feed for the LDA.

I've also got the turbo xantia pipe which I intend to use as it avoids the costly option of using multiple silicone bends.

Are these restrictive enough to warrant using metal piping?

Cheers.

[4WayDiablo]

How do you mean restrictive enough?

[silverzx]

They have quite small inner diameter at certain points where it bends.