The part looks to have been marked up wrong by Janspeed. If anything it should be A132S0233F assuming it is a UK{ROW) part? A132S0253F is a Federal spec part.
If people are interested the part numbers are broken down like this. The first letter being the engineering level. Any changes to it mean it goes up a level. A to B to C etc.
The next 3 numbers refer to the model it was originally released on. 132 being Evora, 138 being Exige.
The 4th letter relates to where the part is located on the car. 'S' being an exhaust component.
The next 4 letters are randomly chosen unless it's a proprietary/"bought in part" which would use a 6000 series number, also the other rule is - LH/LHD should be an odd number, RH/RHD should be even (However, this rule was ignored a lot of times on the Tesla Roadster)
The last letter relates to its status, 'F' being a finished part, 'S' a service part and so on.