AP Racing CP2623 Vertical Flange Mount Master Cylinder, Forged Alloy, PRT115 Push Rod, All Bore Sizes Available (Choose Bore Size)
Price range: $310.00 through $371.00
The AP Racing CP2623 is a lightweight, compact, forged-bodied master cylinder suitable for all brake and clutch applications — especially where installation space is restricted. The forged aluminium alloy body saves 50g over the equivalent cast version, and the short travel to cut-off gives crisp, immediate pedal response.

Features
- Forged aluminium alloy body
- 50g weight saving over the cast version
- Short travel to cut-off
- Non-captive cylinders available
- Hydraulic threads are imperial
Specifications
| Weight | CP2623-88 to -94 = 300g (0.66 lb) CP2623-95 & -96 = 340g (0.750 lb) |
| Full Stroke | 25.4mm (1.00″) |
| Travel to Cut-Off | Short — 0.68 to 1.09mm (0.027 to 0.043″) |
| Inlet Hydraulic Thread | 7/16″ x 20 UNF |
| Outlet Hydraulic Thread | 3/8″ x 24 UNF |
| Mounting | Vertical flange |
Push Rod Threads Available
- PRM = M8 x 1.25mm
- PRT = 5/16″ UNF
Push Rod Length from Mounting Flange
- PRM065 — 65mm (2.55″)
- PRM088 — 88mm (3.46″)
- PRM/PRT115 — 115mm (4.53″)
- PRM/PRT160 — 160mm (6.30″)
Other push rod lengths are available. Contact us and we will check with AP Racing’s technical department for you.
Bore Sizes & Part Numbers — Full CP2623 Range
The nine part numbers shown in bold are stocked and can be ordered directly from the drop-down menu above. Every other part number listed below is part of the CP2623 range and is available on request — contact us with the part number you need and we will quote price and lead time.
| Bore Size | Part Numbers |
|---|---|
| 14mm | CP2623-88PRM115 / CP2623-88PRM160 / CP2623-88PRT115 / CP2623-88PRT160 |
| 15mm | CP2623-89PRM088 / CP2623-89PRM115 / CP2623-89PRM160 / CP2623-89PRT115 / CP2623-89PRT160 |
| 15.9mm (0.625″) 5/8″ | CP2623-90PRM065 / CP2623-90PRM088 / CP2623-90PRM115 / CP2623-90PRM160 / CP2623-90PRT115 / CP2623-90PRT160 |
| 16.8mm | CP2623-905PRM088 / CP2623-905PRM115 / CP2623-905PRM160 / CP2623-905PRT088 / CP2623-905PRT115 |
| 17.8mm (0.70″) | CP2623-91PRM065 / CP2623-91PRM088 / CP2623-91PRM115 / CP2623-91PRM160 / CP2623-91PRT115 / CP2623-91PRT160 |
| 19.1mm (0.75″) 3/4″ | CP2623-92PRM065 / CP2623-92PRM088 / CP2623-92PRM115 / CP2623-92PRM160 / CP2623-92PRT115 / CP2623-92PRT160 |
| 20.6mm (0.812″) 13/16″ | CP2623-93PRM065 / CP2623-93PRM088 / CP2623-93PRM115 / CP2623-93PRM160 / CP2623-93PRT115 / CP2623-93PRT160 |
| 22.2mm (0.875″) 7/8″ | CP2623-94PRM065 / CP2623-94PRM088 / CP2623-94PRM115 / CP2623-94PRM160 / CP2623-94PRT115 / CP2623-94PRT160 |
| 23.8mm (0.937″) 15/16″ | CP2623-95PRM065 / CP2623-95PRM088 / CP2623-95PRM115 / CP2623-95PRM160 / CP2623-95PRT115 / CP2623-95PRT160 |
| 25.4mm (1.00″) | CP2623-96PRM065 / CP2623-96PRM088 / CP2623-96PRM115 / CP2623-96PRM160 / CP2623-96PRT115 / CP2623-96PRT160 |
Stocked Part Numbers
CP2623-88PRT115, CP2623-89PRT115, CP2623-90PRT115, CP2623-91PRT115, CP2623-92PRT115, CP2623-93PRT115, CP2623-94PRT115, CP2623-95PRT115 and CP2623-96PRT115 — all with the 5/16″ UNF push rod, 115mm (4.53″) from the mounting flange.
Drawing
Notes
- Hydraulic threads are imperial — inlet 7/16″ x 20 UNF, outlet 3/8″ x 24 UNF.
- Non-captive push rod versions available on request.
- Repair kits and fitting instructions are available for the CP2623 — contact us for the correct kit for your bore size.
- Sold individually. Reservoirs, fittings, and pedal box hardware sold separately.
Sold and supported by Formula Race Parts. Need a different bore, push rod length, or another AP Racing master cylinder? Contact us — we carry the full AP Racing range.

Rebuild kits
When it is time to reseal this cylinder, the matching AP Racing CP2623 master cylinder repair kit is stocked in every bore size. Each kit contains the primary seal, piston washer, secondary seal, circlip and boot.












