Clutch Slave Cylinder
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93

Fits:
Porsche 964 1992-95 all models
A clutch that is engaged/disengaged via hydraulic fluid instead of a cable uses a Clutch Master and Clutch Slave Cylinder. When depressing the clutch pedal a lever is squeezed, forcing hydraulic fluid through hydraulic lines to a "slave cylinder" which houses a piston. The piston forces a push rod to engage or disengage the clutch. A clutch master cylinder that contains the hydraulic fluid sits on a support har near the clutch lever. When either the Master or Slave Cylinder fail the clutch is unable to be disengaged.
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- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Fits:
Porsche 964 Turbo (965)
G50.52 Gearbox
A clutch that is engaged/disengaged via hydraulic fluid instead of a cable uses a Clutch Master and Clutch Slave Cylinder. When depressing the clutch pedal a lever is squeezed, forcing hydraulic fluid through hydraulic lines to a "slave cylinder" which houses a piston. The piston forces a push rod to engage or disengage the clutch. A clutch master cylinder that contains the hydraulic fluid sits on a support har near the clutch lever. When either the Master or Slave Cylinder fail the clutch is unable to be disengaged.
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95011623750
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- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Fits:
Porsche 964 Turbo (965)
G50.52 Gearbox
A clutch that is engaged/disengaged via hydraulic fluid instead of a cable uses a Clutch Master and Clutch Slave Cylinder. When depressing the clutch pedal a lever is squeezed, forcing hydraulic fluid through hydraulic lines to a "slave cylinder" which houses a piston. The piston forces a push rod to engage or disengage the clutch. A clutch master cylinder that contains the hydraulic fluid sits on a support har near the clutch lever. When either the Master or Slave Cylinder fail the clutch is unable to be disengaged.
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95011623750
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- 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 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
- Porsche 356B 1959-63
- Porsche 912E 4CYL 1976
Bleed nipple cap for brake caliper and clutch slave cylinder

Fits:
Porsche 356B
Porsche 911 - 1965 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 944 - 1982 to 1989
Porsche 928 - 1978 to 1990
Click 'Zoom in' for large parts diagram.
Diagram ref no 15
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- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
9m G50 Billet Uprated Clutch Slave Cylinder- Precision Engineering for Effortless Clutch Control
The 9m G50 Billet Uprated Clutch Slave Cylinder is a
premium, performance-focused upgrade designed to deliver superior clutch feel,
reduced weight, and unmatched reliability.
Precision CNC-machined from high-grade 7075 aluminium and hard-anodized
for durability, this component is built to exceed the performance of
standard equipment while retaining complete compatibility with your
G50-equipped Porsche transmission.
Fits:
Diagram ref no 1
Offering a 45% weight reduction compared to conventional cast components, it significantly improves pedal response and reduces fatigue — ideal for both street and track applications.
What It Does
The clutch slave cylinder converts hydraulic pressure from
the master cylinder into mechanical force to engage and disengage the clutch.
The 9m billet unit refines this process with enhanced precision and efficiency.
Key Functional Benefits:
- Precision
CNC Machining: Guarantees exact tolerances for optimal hydraulic
control and reliability.
- 7075
Aluminium Construction: Delivers exceptional strength-to-weight ratio
with 45% less mass than the original unit.
- Reduced
Pedal Effort: Provides a much lighter, smoother clutch feel,
enhancing drivability.
- Hard-Anodized
Finish: Resists corrosion, wear, and heat for extended service life.
- Direct Plug-and-Play Replacement: Simple installation with no modifications required.
This uprated billet slave cylinder ensures consistent clutch engagement, better modulation, and reliable operation under high-load or high-temperature driving conditions.
Why Clutch Slave Cylinders Fail
Standard clutch slave cylinders often fail due to design
limitations, wear, or environmental exposure. Common causes include:
- Seal
Deterioration: Over time, hydraulic seals degrade, leading to fluid
leaks and loss of pressure.
- Corrosion:
Moisture contamination or fluid neglect can corrode internal components.
- Heat
Fatigue: Repeated high-temperature cycles can cause warping or
cracking in cast materials.
- Contaminated
Fluid: Dirt or debris in the hydraulic system accelerates internal
wear.
- Material Fatigue: Cast or composite housings are prone to cracking under high clutch-pressure loads.
When failure occurs, symptoms typically include clutch pedal softness, inconsistent engagement, or complete loss of hydraulic function — all of which can compromise drivability and safety.
Why It Should Be Replaced or Upgraded
Upgrading to the 9m G50 Billet Clutch Slave Cylinder
provides lasting performance advantages over conventional units:
- Improved Reliability: 7075 aluminium construction
resists flexing, cracking, and corrosion.
- Lighter Pedal Effort: Redesigned internal geometry provides a smoother
and lighter clutch action.
- Enhanced Durability: Hard-anodized surface resists wear and
contamination.
- Precision Engineering: CNC machining ensures exact fitment and
consistent hydraulic pressure.
- Direct Fit: A plug-and-play solution requiring no modifications —
perfect for enthusiasts or professional installers.
- Performance Upgrade: Ideal for high-power builds or track-day cars where clutch precision is critical.
Replacing a worn clutch slave cylinder with this uprated billet design improves reliability, performance, and driving experience, ensuring flawless clutch operation for years to come.
Advantages at a Glance
- Precision CNC-machined from 7075 aluminium
- Hard-anodized for long-term corrosion resistance
- 45% lighter than standard cast designs
- Noticeably lighter, smoother pedal feel
- Complete plug-and-play compatibility
- Designed and engineered by 9m (Ninemeister)
- Perfect for both performance street and track vehicles
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Porsche Clutch Slave Cylinders | Hydraulic Precision & Smooth Gear Engagement
The clutch slave cylinder is a vital component in your Porsche’s hydraulic clutch system. Working in tandem with the clutch master cylinder, it converts hydraulic pressure into mechanical movement to disengage the clutch, allowing smooth and precise gear changes. A properly functioning slave cylinder ensures a consistent clutch pedal feel and reliable performance on every drive.
At Design911, we supply premium clutch slave cylinders designed to meet or exceed original performance standards. Each component is precision-engineered using high-grade materials and corrosion-resistant seals to maintain hydraulic pressure, resist fluid leaks, and deliver smooth, consistent clutch engagement.
Whether you’re restoring a classic 911 or maintaining a modern Porsche sports car, our clutch slave cylinders ensure reliability, precision, and the performance your vehicle deserves.
What Does a Clutch Slave Cylinder Do?
The clutch slave cylinder is the final link in the hydraulic clutch system, responsible for actuating the clutch release mechanism.
Core Functions:
- Converts hydraulic pressure from the master cylinder into clutch release movement.
- Allows gear engagement and disengagement with minimal pedal effort.
- Maintains proper hydraulic pressure throughout the clutch system.
- Ensures consistent pedal feel and smooth shifting performance.
- Works in sync with clutch master and release bearing components.
Without a properly functioning slave cylinder, clutch engagement becomes inconsistent, leading to stiff or spongy pedal feel and difficulty shifting gears.
Why Do Clutch Slave Cylinders Fail or Degrade?
Clutch slave cylinders operate under high hydraulic pressure and are exposed to heat, vibration, and clutch dust — all of which can cause wear and failure over time.
Common Causes of Failure Include:
- Internal seal wear causing fluid leaks.
- Air ingress into the hydraulic system.
- Corrosion from moisture-contaminated brake fluid.
- Cracked housing due to mechanical stress or age.
- Fluid contamination leading to seal deterioration.
When a slave cylinder fails, you may notice clutch fluid leaks, a soft or sinking pedal, or complete clutch disengagement failure.
Why Replace or Upgrade Your Porsche Clutch Slave Cylinder?
Replacing a worn or leaking clutch slave cylinder restores proper hydraulic performance, consistent clutch engagement, and pedal response.
Key Benefits:
- Restores smooth, responsive clutch operation.
- Prevents fluid leaks and loss of hydraulic pressure.
- Improves gear shift accuracy and driver control.
- Ensures long-lasting reliability and performance.
- Compatible with Porsche 911, Boxster, Cayman, and other models.
- Ideal for routine maintenance, clutch upgrades, or complete hydraulic rebuilds.
For optimal performance, it’s recommended to replace both the master and slave cylinders together to maintain system balance and pressure consistency.
Highlights
- Precision-engineered Porsche clutch slave cylinders.
- High-quality seals and durable construction for reliability.
- Consistent hydraulic pressure and pedal feel.
- Direct-fit replacements for modern and classic Porsche models.
- Resistant to heat, corrosion, and clutch fluid degradation.
- Perfect for maintenance, performance upgrades, or restorations.