# AP Racing Master Cylinder, Ø 15 mm - 115 mm M8 x 1.25 rod

> AP Racing Master Cylinder, Ø 15 mm, for racing brakes and clutch. Forged aluminum body, vertical flange, and 115 mm M8 x 1.25 rod.

- URL: https://www.gt2i.ch/en/master-cylinder-without-reservoir/70007-ap-racing-master-cylinder-o-15-mm-115-mm-m8-x-125-rod-3661768476154.html
- Reference: AP-CP2623-89M115
- Price: CHF 226.00
- Brand: AP RACING
- Availability: out of stock

## Description

The AP Racing master cylinder (Ø 15 mm), part number CP2623-89PRM115, is designed for hydraulic controls for brake and clutch systems in racing applications. Its compact design is particularly well-suited for installations where space is limited.
Its forged aluminum body is lighter than that of the cast aluminum version, offering a weight savings of 50 g. It features a vertical mounting flange, a short stroke before the fluid supply shuts off, and UNF imperial hydraulic threads.
This version features a master cylinder diameter of 15 mm (0.590 in) and an M8 x 1.25 threaded push rod measuring 115 mm, measured from the mounting flange. Its BLACK/RED plastic clamp allows for quick identification of the diameter.
Technical Specifications
Brand: AP Racing.
Manufacturer Part Number: CP2623-89PRM115.
Range: CP2623.
Actuation: Push.
Mounting: Vertical flange.
Master cylinder diameter: 15 mm - 0.590 in.
Identification clamp color: BLACK / RED.
Total stroke: 25.4 mm.
Hydraulic inlet: 7/16 in-20 UNF.
Hydraulic outlet: 3/8 in-24 UNF.
Stroke before shut-off: 0.68 to 1.09 mm - short.
Mounting hole center distance: 57.2 mm.
Mounting hole diameter: 8.7 mm.
Shaft thread: M8 x 1.25.
Rod length from mounting point: 115 mm.
Body material: Forged aluminum.
Weight savings: 50 g compared to the cast aluminum version.
Diameter identification by color
AP Racing master cylinders come with a small colored plastic clamp wrapped around the body to make it easier to identify their diameter. The part number and nominal diameter are also marked on the body.
The following table applies to push-type master cylinders. This part number features a BLACK/RED clamp corresponding to 15 mm - 0.590 in.
ColorDiameter in mmDiameter in inchesBLACK / ORANGE14 mm0.551 inBLACK / RED15 mm0.590 inBLACK15.9 mm0.625 in - 5/8 inBLACK / YELLOW16.8 mm0.661 inBLUE17.8 mm0.70 inGREEN19.1 mm0.75 in - 3/4 inORANGE20.6 mm0.812 in - 13/16 inRED22.2 mm0.875 in - 7/8 inWHITE23.8 mm0.937 in - 15/16 inYELLOW25.4 mm1.00 inNon-captive rod versions
The CP2623 range also includes non-captive rod versions, available under separate part numbers. These allow the master cylinder to be replaced without removing the pedal or lever rod. The part number CP2623-89PRM115 shown here is a captive rod version.
Replacement Parts and Repair Kit
Repair kit part number: AP Racing CP2623-89RK, sold separately.
Mounting and Connections
Check the mounting, connections, and alignment of the control unit. The 115 mm dimension refers to the length of the rod from the mounting point, not the length of the body. The shaft thread is for the mechanical connection; it is separate from the hydraulic threads.
Master cylinders are individually adjusted during manufacturing: do not interchange push rods, pistons, or internal components between different assemblies.
Photo and Master Cylinder Selection
The photo shows the AP Racing CP2623 range and is not binding regarding the color of the identification clamp. To select the model suitable for your mounting, refer to the part number and technical specifications listed in this data sheet.
Before ordering, be sure to check the master cylinder diameter, threading, rod length, and fastening type. If you have any questions, our technicians can help you select the correct part number for your system. Feel free to contact them.
Key Features
Forged aluminum body: 50 g lighter than the cast aluminum version.
Compact design: suitable for installations with limited space.
Short stroke before fluid supply shuts off: 0.68 to 1.09 mm.
Dual application: hydraulic brake and clutch controls.
Visual identification: BLACK/RED clamp for the 15-mm diameter.

## Features

- Product type: 
- Metric thread: M8x125
- First word type: Master cylinder