t3 turbo .42ar $170
jgs tools BP T3 turbo manifold $380
BP T3 oil line kit $95
ebay intercooler $100
ebay intercooler universal 2.5in piping $200
550cc injectors $380 ( all i could find any cheaper ones?)
Flyin Miata downpipe $200

Alright first off I want to know if this setup will work and what else I would need?

Im not sure that intercooler kit or downpipe will work but its all I can find for now?

Can I get lower cc injectors for cheaper?

If you can suggest better fitting parts for that turbo that would be appreciated.

What psi could I run this setup at?

Any help will be appreciated thank you for your time..