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Porsche > Boxster 986/987/981 (1997-2016) > Boxster 981 S / GTS 3.4L 2012-16 > Brakes >

Brake Calipers

Brake Calipers

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DISPLAYING 1 to 5 (of 5 products)
Brake Caliper Bleeder Valve, With Dust Cap. Porsche 918 / 981 / 982 / 991 / 997 - 99735291900, 99135291701, 99735291700
2
Brake Caliper Bleeder Valve, With Dust Cap. Porsche 918 / 981 / 982 / 991 / 997
Special Order item
99735291900
Product Information
Product Information
Brake Caliper Bleeder Valve, With Dust Cap.
The Genuine Porsche Brake Caliper Bleeder Valve 99735291900 is a replacement brake-system service component supplied with a protective dust cap for compatible Porsche brake calipers.
Sold Each.

Fits:
  • Porsche Boxster 981 2.7L 2012-16
  • Porsche Boxster 981 S / GTS 3.4L 2012-16
  • Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
  • Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
  • Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>>
  • Porsche 997 MK1 TURBO 2007-09
  • Porsche 997 MK1 GT2 2007-09
  • Porsche 997 MKII GT3 / GT3 RS 2010-11
  • Porsche 997 MKII Turbo 2010-13
  • Porsche 997 MKII GT2 RS 2011-13
  • Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
  • Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
  • Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
  • Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
  • Porsche 991.1 R 4.0L (500 Bhp) 2016
  • Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
  • Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
  • Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
  • Porsche Cayman GT4 3.8L 2015-16
  • Porsche Cayman 718 2.0L Manual (300 Bhp)
  • Porsche Cayman 718 2.0L PDK (300 Bhp)
  • Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L
  • Porsche 918 Spyder 4.6L 2014-15  

Diagram Ref No 8

Installed in the brake caliper, the bleeder valve provides a controlled point for releasing trapped air and old brake fluid when bleeding or servicing the hydraulic braking system. When closed, the valve must seal securely to maintain the integrity of the hydraulic circuit.

Because the braking system depends on correctly pressurised hydraulic fluid, a damaged, corroded, seized or leaking bleeder valve should not be ignored. Replacement helps ensure the caliper can be properly bled while maintaining a reliable fluid-tight seal during normal braking operation.

What This Product Does:
The bleeder valve provides a service point for removing air and old brake fluid from the hydraulic brake system.

During the brake-bleeding procedure, the valve is opened in a controlled manner so that brake fluid and trapped air can leave the caliper.

Once bleeding is complete, the valve is tightened to create a secure hydraulic seal.

Its main functions are to:

  • Provide a controlled brake-bleeding point
  • Allow trapped air to be removed from the caliper
  • Allow old brake fluid to be flushed during servicing
  • Help achieve a firm and consistent brake pedal
  • Seal the hydraulic system when closed
  • Support correct brake maintenance and fluid replacement

Although physically small, the bleeder valve performs an important role in maintaining and servicing the braking system.

Symptoms Of Wear Or Failure:
Common signs that a brake caliper bleeder valve may require replacement include:

  • Brake fluid leaking around the valve
  • Valve will not seal correctly
  • Seized bleeder valve
  • Heavy corrosion
  • Rounded or damaged hex
  • Damaged threads
  • Damaged valve seating surface
  • Valve broken during removal
  • Restricted or blocked fluid passage
  • Difficulty bleeding the caliper
  • Brake fluid continues to seep after tightening
  • Missing or damaged dust cap
  • Previous overtightening damage

Any brake-fluid leak should be investigated immediately.

Why Replacement Matters:
Replacing a worn, seized or damaged brake caliper bleeder valve helps maintain both the serviceability and hydraulic integrity of the brake system.

A correctly functioning replacement helps:

  • Provide a reliable brake-bleeding point
  • Allow trapped air to be removed
  • Support proper brake-fluid changes
  • Maintain a secure hydraulic seal
  • Prevent brake-fluid leakage from a defective valve
  • Restore future serviceability of the caliper
  • Protect the bleed point with the supplied dust cap
  • Support consistent brake-system operation

Because this component is part of the hydraulic braking system, defects should be addressed promptly.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99735291900
99735291900
99135291701
99735291700

The product you are viewing cross references to these numbers
Brake caliper, FRONT. Porsche 981 Boxster S / 981 Cayman S - 98135142301, 98135142401
1
Brake caliper, FRONT. Porsche 981 Boxster S / 981 Cayman S
Special Order item
98135142
Product Information
Product Information
Brake calipe, FRONT.

porsche

front
Porsche 981 Boxster S 3.4L 2012>>
Porsche 981C Cayman S 3.4L 2013>>

PLEASE NOTE: these calipers will not fit cars with PCCB Ceramic Brakes

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

98135142
98135142301
98135142401

The product you are viewing cross references to these numbers
Brake caliper, REAR. Porsche 981/982 Boxster S / 981/982 Cayman S - 98635242310, 98635242311, 98635242410, 98635242411
1
Brake caliper, REAR. Porsche 981/982 Boxster S / 981/982 Cayman S
Special Order item
98635242
Product Information
Product Information
Brake caliper, REAR.

porsche

rear
Porsche 981 Boxster S 3.4L 2012>>
Porsche 718 (982) Boxster S 2017>>
Porsche 981C Cayman S 3.4L 2012>>
Porsche 718 (982C) Cayman S 2017>>

PLEASE NOTE: these calipers will not fit cars with PCCB Ceramic Brakes.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

98635242
98635242310
98635242311
98635242410
98635242411

The product you are viewing cross references to these numbers
Cera-Tec metal free permanent lubricant textar
2
Cera-Tec metal free permanent lubricant textar
TEXCERA
Product Information
Product Information
Cera-Tec metal free permanent lubricant Textar


textar

For brake systems and is highly temperature-resistant (up to 1,000°C).

Available in 75ml tube and 5ml sachet

The advantages of Cera Tec:
• Non-conductive and contains no solids
• Suitable for ABS
• Facilitates brake installation
• Reduces brake squealing
• Protects against scoring and corrosion
• Free of copper and acids 
• Pressure-resistant / high viscosity

Cera Tec is also suitable for lubricating:• Disc- and drum-brake systems
• Compressors
• Centralised lubrication systems
• Axle bearings
• Chains
• Seat rails
• Sunroof tracks
• Battery terminals

Application:
Apply a thin layer of Cera Tec on the marked sections




Find out about Textar product verification here
Hydra tec lubricant for maintenance work and protection Textar - 81001401, 81001400, 81001500
3
Hydra tec lubricant for maintenance work and protection Textar
81001
Product Information
Product Information

Hydra tec lubricant for maintenance work and protection Textar

Available in 75ml Tube or 5ml Sachet

The Advantages of Hydra Tec:

  • Facilitates the installation of hydraulic brake components
  • Tested compatibility with commercially available braking fluids (DOT3, DOT4, DOT4LV, DOT5.1)
  • Free of mineral oils and compatible with EPDM rubber
  • In addition, running surfaces are protected against corrosion

Hydra Tec is suitable for lubricating:

  • Cylinder running surfaces
  • Pistons
  • Sealing elements

Application:
Apply a thin layer of Hydra Tec on the marked sections.

Note:
Hydra Tec should be applied thinly and evenly. 
Never use mineral oils or greases as substitutes.
Do not apply the product on friction surfaces of brake pads or brake discs.

Find out about Textar product verification here

DISPLAYING 1 to 5 (of 5 products)
Also found on these pages
About Brake Calipers

Porsche Brake Calipers | Design911 Precision Replacement & Performance Upgrades for Stopping Power & Control

Brake calipers are a vital part of your Porsche’s braking system — responsible for clamping the brake pads against the disc to create friction and slow the car safely and efficiently. They play a key role in delivering the sharp, responsive braking feel Porsche is renowned for. Whether you’re restoring a classic model or enhancing a modern performance car, maintaining or upgrading your calipers ensures consistent stopping power and driving confidence.

At Design911, we offer a wide selection of brake calipers engineered for precision performance, exact fitment, and long-term reliability. Each caliper is designed using high-quality materials to provide superior heat dissipation, even pressure distribution, and enhanced braking control. Ideal for road, track, or restoration projects, our calipers deliver the perfect blend of safety, strength, and Porsche performance heritage.

What Do Brake Calipers Do?

Brake calipers are the heart of the braking system, converting hydraulic pressure into mechanical force to bring your Porsche to a controlled stop.

Core Functions:
• Apply pressure to the brake pads for effective friction and deceleration.
• Ensure even braking force across each wheel.
• Maintain consistent braking feel and performance under heat and load.
• Work with brake discs and pads to optimise stopping distance.
• Provide responsiveness and control during aggressive driving or track use.

A well-functioning brake caliper guarantees stability, safety, and precision every time you hit the brakes.

Why Do Brake Calipers Fail or Degrade?

Over time, brake calipers are exposed to extreme heat, pressure, and environmental conditions — all of which can cause performance degradation or mechanical failure.

Common Causes of Failure Include:
• Corrosion or rust on pistons and seals.
• Leaking hydraulic fluid from worn seals or connections.
• Uneven brake pad wear due to sticking pistons.
• Fading performance from heat saturation and lack of maintenance.
• Physical damage from impact or excessive vibration.

When calipers fail, braking performance becomes inconsistent or unsafe — making replacement or refurbishment essential for maintaining control and confidence.

Why Replace or Upgrade Your Porsche Brake Calipers?

Replacing old or worn brake calipers restores your Porsche’s braking precision and safety. Upgrading to performance calipers can further enhance stopping power, consistency, and resistance to brake fade. Design911 offers options tailored for both daily driving and motorsport use.

Key Benefits:
• Restores even and powerful braking performance.
• Improves safety and pedal feel during high-demand conditions.
• Enhanced heat management and durability.
• Available in performance and original-spec styles.
• Direct-fit design for Porsche-specific applications.
• Perfect for road, track, or restoration builds.

Design911’s Porsche brake calipers deliver the balance of power, control, and endurance your Porsche deserves — engineered for precision and longevity.

Highlights

• Premium Porsche brake calipers for performance and restoration.
• Manufactured from durable, heat-resistant alloys.
• Available for classic and modern Porsche models.
• Precision-engineered for balanced braking performance.
• Ideal for daily driving, track use, or concours restoration.
• Designed for exceptional strength and reliability.

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