52mm Throttle body found

reading through posts i'm learning stuff, but this is what i found while changing the ignition leads
Theres a 52mm throttle body fitted and an aluminium inlet manifold, Now as she looks likes a base model i'm sure this are not standard fittings from the factory, Could someone shread any light on these parts and what performance if any these parts may produce??
Any info on these parts would be appreciated

she is an MGF year 2000 on the X reg, Non ABS, the only comforts are Elec winds & elec mirrors, NO aircon, cloth interia, so pretty basic model

How do you know it's a 52mm?

David Aiketgate wrote: How do you know it's a 52mm?

it's alloy, it has delorto made in italy and 52 in the casting

That's a 52 then. :bust:

David Aiketgate wrote: That's a 52 then. :bust:

am i right in thinking that, this is not standard factory fitting for this model and year? and some one has upgraded

Standard would be an alloy 48mm on a plastic manifold. The vvc had an alloy manifold.