t3/t4

looking to get a used turbo saw an older turbonetics on cl. asked buyer what trim it was he said t3/t4 48 trim i feel like this is way too small but i havnt asked him what a/r or even hot side specs. he said that its good for up to 400 hp but i tend not to believe anybody selling used stuff on...

I need small help with my D16 Build, I'm not asking anything I could not figure out my self or see in the forums I'm planning on buy 76mm Vitara's but not sure which to buy, there seems to be one person likes one and someone else likes another, just need the best ones for a budget build I need...