I need help ordering the piping as far as correct size.

what I have so far is

hx 35
hot pipe 4" od
intake 4" id
compressor 2.5 od
t-4

s480
hot pipe 5" id
intake 5.5" id
compressor 3" od
T-6

I am wanting to order all my fittings and pipe but since I am ordering online I hate sending stuff back.

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figured it out no 2.5 just 3 4 and 5in pie is needed