As the title, I searched on here and did not find any clear answer so can someone tell me what a P-Trim turbo is - I'm gettin a really good deal on one and wonder if there is anything I should worry about a P-Trim?

 

P trim is the exhaust wheel size.

 

^^^ correcto. common exhaust wheels are stage 3 t31 and stage 5 t350. p trim wheels are larger than both of those.