A 304mm x 28mm AP brake disc better known as the "Metro" disc to be fitted with the CP5040/2S4/3S4 which if you have 15" wheels on your car then this is the kit to fit.
Full dimensions are listed below.

A’ Outside Diameter - mm304
‘B’ Thickness - mm28 ‘C’ Eye Diameter - mm201.4
‘D’ Inside Flange Diameter - mm164 ‘H’ Flange Thickness - mm6.57 ‘M’ P.C.D. Diameter - mm177.8
Mounting Hole Number12 Mounting Hole Diameter - mm6.4
Mounting Fixing Type"Bolted" Mounting Bobbin Part NumberN/A
Max Pad DepthD48
Air Gap - mm14
Number of Vanes48
Face Types AvailableG8
Weight - Kg4.9

Part number CP3580-2572  right side