Pipes For Air Filter/Future FMIC

[bigcheez2k3]

Trying to work out which pipes I need to go from the turbo inlet, along the back of the engine and to the front to an air filter. It seems it's common to use aluminium piping but my dad should be able to get hold of some stainless steel tubing for me at a good price so I'll be using that, unless that'd be a bad idea?

From what I've worked out from a search, looking at the engine and measuring the turbo I'm looking for:

2" (51mm) silicone bend on the inlet (measured the TD04 inlet at 2")
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Small piece of 2" SS pipe
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2" silicone bend
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SS pipe that runs along the back of the block (How long, roughly?)
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Silicone bend
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SS pipe towards front then attach a cone filter to that. (Again, roughly how long?)

Would that be correct or should I be looking at a different size of pipe?

Intending to upgrade to an FMIC in the future so this same piping will be used for that, will just add to it when the times comes.