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- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
OE Match quality replacement for the original Porsche unit referenced by part number 997.355.910.00 / 99735591000. The brake master cylinder converts the force applied to the brake pedal into hydraulic pressure that activates your brake calipers and slows the car. It ensures consistent braking force and modulation under daily driving or spirited use. Without a fully functioning master cylinder, braking performance can be compromised.
Fits:
Porsche 987.1 Boxster 2005 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.1 Cayman 2006 - 2008
Porsche 987C.2 Cayman 2009 - 2012
Porsche 997.1 Carrera 2 2005 - 2008
Diagram ref no 5
Function: It houses pistons and seals that pressurize brake fluid and distribute appropriate pressure to front and rear brake circuits. When you press the brake pedal, this unit ensures the correct volume and pressure of fluid is sent through the lines for dependable stopping power.
Replacing a worn or failing master cylinder is critical for safe braking performance. Over time, internal seals deteriorate, leading to spongy pedal feel, reduced brake responsiveness, or loss of hydraulic pressure. Installing a high-quality OE Match unit restores proper brake pressure, improves pedal feel, and ensures consistent stopping power - essential for both everyday driving and performance scenarios.
When to replace
You should inspect and consider replacing your brake master cylinder if you notice any of the following:
• Brake pedal feels soft, spongy, or sinking
• Visible brake fluid leaks around the firewall or master cylinder
• Inconsistent brake pressure during stopping
• Warning lights on the dashboard indicating brake system issues
• Age-related wear or part has exceeded recommended service life
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99735591000
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 914 (1970-1976)
The OE MATCH Brake Master Cylinder BIG BORE is a hydraulic braking component designed to convert brake pedal force into hydraulic pressure for the vehicle’s braking system. Featuring a larger bore design, this master cylinder is engineered to provide increased fluid displacement, making it particularly suitable for vehicles fitted with upgraded brake calipers or performance braking systems that require greater hydraulic volume.
Fits:
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 914 (1970-1976)
This is a high performance upgrade to the stock Porsche 911 Master Cylinder for non-power brake applications. The increased 23mm bore (vs. 19mm) should be used on cars that are fitted with 'larger than stock' brakes to increase pedal pressure and feel. Unlike other kits on the market, which require modifications to the lines and the push rod, our Master Cylinder is a direct fit.
The master cylinder is designed to deliver precise brake pedal feel, consistent hydraulic pressure, and reliable braking performance. As the central component of the hydraulic braking system, it plays a critical role in ensuring safe, responsive, and predictable stopping power.
What This Product Does:
- Converts brake pedal input into hydraulic pressure
- Supplies brake fluid pressure to the braking system
- Provides increased fluid displacement through its larger bore design
- Supports performance and upgraded brake system applications
- Maintains consistent brake pedal feel and braking response
- Works with dual-circuit braking systems for enhanced safety
Symptoms Of Wear Or Failure:
- Soft or spongy brake pedal feel
- Brake pedal slowly sinking under pressure
- Reduced braking effectiveness
- Brake fluid leaks around the master cylinder
- Inconsistent brake pressure or pedal response
- Difficulty building hydraulic pressure
- Brake warning lights illuminating
- Internal seal wear causing pressure loss between circuits
Why Replacement Matters:
- Restores correct hydraulic pressure throughout the braking system
- Improves brake pedal feel and responsiveness
- Ensures consistent and predictable braking performance
- Prevents brake fluid leaks and pressure loss
- Supports safe operation of dual-circuit braking systems
- Maintains compatibility with performance brake upgrades
- Reduces the risk of braking system failure
- Helps preserve driver confidence and vehicle safety under all driving conditions
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135501202
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 914 (1970-1976)
The OE MATCH Brake Master Cylinder, Standard 19mm Bore is a hydraulic braking system component designed to convert brake pedal force into hydraulic pressure, allowing effective operation of the vehicle’s braking system. Featuring a standard 19mm bore, this master cylinder replicates the original factory specification, providing the correct hydraulic balance, pedal feel, and braking performance intended by Porsche.
For Cars With Stop Light Switch.
NOTE: Does Not Come With New Switch. Has To Be Transferred Over Or Bought Separately. Part Number 90161311500
Fits:
The master cylinder is engineered for precise brake modulation, reliable fluid pressure generation, and long-term durability. As the central component of the braking system, it distributes hydraulic pressure to the brake calipers or wheel cylinders, ensuring safe and predictable vehicle stopping performance.
What This Product Does:
- Converts brake pedal force into hydraulic pressure
- Distributes brake fluid pressure throughout the braking system
- Provides the correct hydraulic volume for standard braking setups
- Maintains original factory brake pedal feel and response
- Supports safe and consistent braking performance
- Works with dual-circuit braking systems for added safety
Symptoms Of Wear Or Failure:
- Soft or spongy brake pedal feel
- Brake pedal slowly sinking under sustained pressure
- Reduced braking performance or longer stopping distances
- Brake fluid leakage around the master cylinder
- Inconsistent brake pressure or uneven braking response
- Difficulty maintaining hydraulic pressure
- Brake warning lights illuminating
- Internal seal deterioration causing fluid bypass and pressure loss
Why Replacement Matters:
- Restores proper hydraulic brake pressure
- Improves brake pedal feel and responsiveness
- Maintains factory braking characteristics and performance
- Prevents brake fluid leaks and pressure loss
- Supports safe operation of the dual-circuit braking system
- Reduces the risk of brake system failure
- Ensures predictable and consistent stopping performance
- Helps maintain driver confidence and vehicle safety under all driving conditions
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135501202
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 356B 1959-63
- Porsche 356C 1963-65
- Porsche 914 (1970-1976)
Fits:
Porsche 356 B / C 1960-65
Porsche 911 1965-67
Porsche 911 1970-73
Porsche 914 1970-76
Diagram ref 19
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91461349100
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 914 (1970-1976)
- Porsche 912E 4CYL 1976
Brake master cylinder reservoir (also known as a brake fluid reservoir with cap), manufactured to match original equipment specifications for classic Porsche vehicles. This reservoir holds and supplies brake fluid to the master cylinder, facilitating proper hydraulic pressure within the brake system and ensuring safe, effective braking performance.
Fits:
Porsche 911 1968
Porsche 911 1974 - 1986
Porsche 911 (930) 1975 - 1977
Porsche 914 1970 - 1976 (914-1.8/1.8V ; 914-2.0)
Diagram ref no 1.
The brake fluid reservoir sits atop the master cylinder and holds the hydraulic brake fluid needed for your vehicle’s braking system. As brake fluid levels drop during use, the reservoir compensates, ensuring uninterrupted fluid supply. Its cap seals the system, preventing contamination and fluid loss while withstanding under-hood heat and exposure to brake fluid.
Over time, brake fluid reservoirs can become cracked, brittle, or warped due to heat and constant exposure to corrosive brake fluid. A compromised reservoir can lead to fluid leaks, low brake fluid levels, and ultimately reduced braking performance or failure. Replacing it restores integrity to the brake system and helps ensure a safer, more reliable driving experience.
Replace the brake fluid reservoir when you observe any of the following:
• Visible cracks, splits, or deformations in the reservoir body
• Fluid leaks around the cap or reservoir walls
• Discoloured or contaminated reservoir plastic
• Brake fluid level dropping frequently without visible brake system leaks
• During a brake system overhaul or master cylinder replacement
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135501313
The product you are viewing cross references to these numbers