On the initial install considering the engine is very low mileage, we are using my 60mm bore exhaust (standard for this engine is 55mm) and custom intercooler most likely, I'd expect modest gains over the standard power and torque which should be adequate fun with the quaife diff. Then once I'm happy with everything being sound and loosened up (and I've saved some more) will look at increasing power.

Who is your apprentice out of interest?