just checking a few points have been offered a t4 for my 4x4 sapph is the manifold flange the same size as on a standard 4x4 manifold and also would i need a full set of larger boost hoses.at present running on greys fast road cams 10mm plenum spacer greys and a t34.63.would it be noticably better running a t4 and get me on to the right side of 400bhp?