My '99 V70 XC AWD with the B5245T engine turbo needs to be replaced at 137K. It's the stock low pressure unit, a 13G model. I read somewhere that I could simply swap out this for either a 15G or 16T and should go with the 16T. Is this correct? Any problems to watch out for? Anything else to check or replace while I'm at it? THANKS!