Identification of Bore Sizes
All AP Racing master cylinders have their part number, nominal bore size laser marked on the body together with batch codes. This allows full manufacturing traceability. All master cylinders also have a coloured tie wrapped around body for quick visual identification of bore size.
The tables below show the bore size colour identification for push type cylinders and pull type cylinders.
| Colour Identification for Push Type Cylinders | |
| Colour | Bore Size |
| Black/Orange | 14mm (0.551") |
| Black/Red | 15mm (0.590") |
| Black | 15.9mm (0.625") 5/8" |
| Black/Yellow | 16.8mm (0.661") |
| Blue | 17.8mm (0.70") |
| Green | 19.1mm (0.75") 3/4" |
| Orange | 20.6mm (0.812") 13/16" |
| Red | 22.2mm (0.875") 7/8" |
| White | 23.8mm (0.937") 15/16" |
| Yellow | 25.4mm (1.00") |
| Colour Identification for Pull Type Cylinders | |
| Colour | Bore Size |
| Black/Red | 14.9mm (0.587") |
| Black | 16.2mm (0.638") |
| Blue | 17.3mm (0.681") |
| Green | 18.8mm (0.740") |
| Orange | 20.2mm (0.795") |
| Orange/Red | 21.2mm (0.834") |
| Red | 21.8mm (0.858") |
| Red & White | 22.4mm (0.882") |
| White | 23.7mm (0.933") |
| Yellow | 25.4mm (1.00") |