That is the question.Im wanting a bit more top end pull from my five.Currently i have a t25/t2 with a 47 rear and a tb22 turbine wheel running 177hp with 20lb boost.To be honest im happy with the power output its just the fact it runs out of puff too low in the revs.Would a t25 with say a 49 rear give me what im after?and would it work with the oe cam?Or would fitting a cam such as the 285 be a better option.Thanks