Silicon or Medal elbow?

I have a BorgWarner S300SX3 with a normal Compressor housing. The model is number 177275. My question is should I use the Silicon elbow or get a metal one and vband clamp it to the turbo? The only problem with that is I can not find a metal elbow that fits it. Would a S400 elbow fit it?

Here is the link for the turbo with the specs. Model number is 177275
177275 Borg Warner S300SX3 AirWerks Performance Turbo



I have a Silicon elbow from HPS, here are the specs


Technical Specification
Temperature Range:- 65 deg. F to + 350 deg. F (177 deg. C)
Reinforced Layer: 4-ply
Color: Black / Blue

Remark
Silicone hose is NOT compatible with fuel or oil.
Silicone hose is compatible with water or anti-freeze such as coolant.

HPS High Temp Reinforced 90 Degree Elbow Coupler Silicone Hoses Black