OE Match

Window Regulator, With Motor.
Restore smooth, reliable power window operation on your Porsche 911, 964 or 993 with these full regulator + motor assemblies.

Fits:

• 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

Diagram Ref No 1 And 2

What This Product Does:

• The window regulator part lifts and lowers the window glass inside the door. The motor drives this mechanism when you press the window switch.
• When working, the assembly ensures the glass travels smoothly up and down, stays aligned, seals properly against the weather strip, and does not creak, jam or drop.
• A combined motor + regulator unit means proper integration of the gear-train, mounting points, guides/tracks, and wiring — all designed to match original vehicle spec.

Symptoms & Signs You Might Need Replacement:

• The window won’t move when you press the switch (the motor might spin or click but glass doesn’t move).
  
• The window moves slowly, jerks, binds or stops part-way up/down.
  
• You hear grinding, clicking, or scraping noises from inside the door when operating the window.
  
• The window appears crooked, tilts, drops into the door, or doesn’t seal properly when fully raised.
  
• The motor appears to work but the mechanism is worn (e.g., cable slipped), meaning you may as well replace regulator + motor.
• During door panel removal for other repairs, the old mechanism shows visible wear, rust or broken components — replacing the full assembly is often wise.

Why Replacement Matters:

• Restores proper operation of your power windows — a vital convenience, weather-seal and security function in a vehicle.
  
• Prevents further damage: A failing regulator or motor can harm the window glass, tracks, seals or wiring — replacing early avoids larger expense.
  
• Cost-effective: Replacing the full unit (regulator + motor) ensures compatibility and avoids future failure of a component you didn’t address.

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91154293

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Window Regulator, Without Motor.
Restore proper window operation on your Porsche 911, 964 or 993 with these direct-replacement regulators without motors.

Fits:

• 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

Diagram Ref No 1

What This Product Does:

• The window regulator is the mechanical mechanism inside the car door that raises and lowers the glass when you press the window switch. Without a functioning regulator, the glass may not move, may bind, or may drop.
• A “without motor” version means you get the regulator/mechanism portion – the gears, tracks/cables, guides – but you reuse or replace the motor separately.
• Having a correct regulator ensures the window travels smoothly, stays aligned, seals properly, and doesn’t sag or fall into the door.

Symptoms & Signs You Might Need Replacement:

• The window does not move up or down when you press the switch, yet you may hear the motor trying.
  
• The window moves slowly, jerks, gets stuck, or stops midway — indicating the regulator mechanism is worn, binding or damaged.
  
• Grinding, clicking or scraping noises when operating the window — the cable, track or gears inside the regulator may have failed.
  
• The glass appears crooked, tilts, drops inside the door or fails to stay up — regulator failure can cause misalignment.
  
  

Why Replacement Matters:

• Restores reliable window operation: A functioning regulator ensures you can raise/lower windows reliably for ventilation, weather protection, security.
  
• Prevents further damage: If regulator fails completely, the motor may overheat, or the glass could drop inside the door, causing damage to glass, tracks, or door internals.
  
• Cost-effective repair: Replacing the regulator mechanism is typically much cheaper than replacing the door glass, motor damage, or dealing with water/weather leaks because of a failed regulator.
  
• Ease of install: Because the motor is reused, you reduce cost and complexity of wiring/motor replacement; the significant difference lies in a fresh mechanical regulator.

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Anti-Roll Bar Mounting Bracket. Porsche 914
Sold each, 2 required per car
Replace the worn or damaged anti-roll bar mounting bracket in your Porsche 914’s suspension system with this precision-engineered replacement component. Designed to securely hold the anti-roll (sway) bar in place, this bracket maintains correct suspension geometry and stabiliser alignment — essential for sharp cornering and balanced ride control.

Fits:

• Porsche 914 (1970-1974)

Diagram Ref No: 28

What This Product Does:

• The anti-roll bar mounting bracket is a crucial part of the front suspension that holds the sway bar bushing and stabiliser bar securely to the chassis. It ensures that the anti-roll bar can twist effectively during cornering, reducing body roll and maintaining stability.
• Properly fitted brackets prevent unwanted movement of the anti-roll bar, ensuring it transmits forces evenly across the suspension and keeps your Porsche planted through corners.
• A solid, corrosion-free bracket ensures the sway bar operates smoothly without excessive flexing or misalignment, supporting predictable handling and safe performance.

Symptoms & Signs Of Wear / When To Replace:

• Clunking or knocking sounds from the front suspension when driving over bumps or during cornering — often caused by loose or cracked brackets.
• Visible corrosion, cracking, or deformation of the original brackets due to age, rust, or impact.
• Excessive body roll or unstable handling indicating that the anti-roll bar is not properly secured.
• If replacing sway bar bushings or performing front suspension restoration, it is recommended to renew these brackets for full system integrity.

Why Replacement Matters:

• Restores handling precision: Ensures the anti-roll bar remains firmly attached, reducing body roll and improving steering feedback.
• Prevents suspension damage: Loose or broken brackets can cause premature wear of sway bar links and bushings — replacing them avoids further component stress.
• Improves safety and ride quality: A properly mounted stabiliser bar is key to maintaining chassis balance and cornering confidence.
• Cost-effective repair: Small, affordable part that prevents larger suspension issues and extends the life of bushings and bar components.

Enhance your Porsche 914’s suspension stability with a replacement anti-roll bar mounting bracket (91450125910) from Design911. This precision-fit component secures the sway bar to the chassis, ensuring consistent anti-roll performance and accurate handling response. Over time, original brackets can rust, deform, or loosen due to years of load cycles and environmental exposure — leading to increased body roll, clunking noises, and poor cornering grip.

Installing new Porsche 914 sway bar brackets restores chassis rigidity, protects suspension components, and keeps your handling tight and responsive. Perfect for classic Porsche restorations, performance upgrades, or preventative maintenance on ageing suspension hardware.

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91450125910

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Convertible Top Drive Cable. Porsche 993 Cabriolet.
Restore the reliable motion of your Porsche 993 Cabriolet’s soft-top system with this high-quality replacement convertible top drive cable. Precision-engineered to the original dimensions, this replacement cable ensures smooth, synchronised operation of the roof drive mechanism and consistent performance over time.

Fits:
Porsche 993 (911) C2 1995-97
Porsche 993 (911) C4 1995-97
VIN Range: From # 996TS341001

Diagram Ref No 11 and 11a

What This Product Does:

• The convertible top drive cable connects the electric motor and transmission units to each side of the soft-top frame, synchronising movement and ensuring both sides of the roof open and close evenly.
• It transmits torque from the roof motor drive to the gear mechanisms in each roof hinge, allowing precise folding, latching, and sealing of the Cabriolet top.
• A well-fitted cable ensures balanced drive force distribution, quiet operation, and smooth folding motion of the 993’s iconic soft-top system.

Symptoms & Signs Of Wear / When To Replace:

• Uneven or jerky roof operation — one side of the top may rise or lower faster than the other.
• Audible clicking, slipping, or grinding noises from within the roof drive system.
• Roof fails to close fully, stops midway, or triggers warning lights due to cable tension loss.
• Frayed, stretched, or snapped cable ends found during inspection of the convertible drive assembly.
• If the soft-top motor or drive gears have been replaced, always inspect and replace old cables to maintain alignment and performance.

Why Replacement Matters:

• Restores smooth and balanced roof motion: A worn or broken drive cable can cause misalignment between left and right sides, risking frame twist or soft-top fabric damage.
• Prevents costly motor or gearbox damage: A binding or stretched cable can overload the roof motor or strip internal gears — timely replacement prevents cascading failures.
• Long-term reliability: High-grade cable replacements are built to withstand the repeated stress and torsion of roof cycles, ensuring dependable operation for years.
• Ideal for preventative maintenance: If your Porsche 993 roof operation has slowed or become noisy, replacing the cables ensures future reliability without major teardown later.

Upgrade or restore your Porsche 993 Cabriolet convertible top drive system with premium replacement drive cables. These precision-built components ensure proper soft-top synchronisation and smooth roof movement, solving common issues like uneven operation, sticking, or incomplete closure. Over time, the original drive cables can stretch, corrode, or snap due to years of torsional stress and lack of lubrication.

By fitting new high-specification drive cables from Design911, you’ll restore perfect alignment, prevent roof motor strain, and eliminate jerky motion. Ideal for Porsche 911 993 Cabriolet owners performing roof repairs, drive motor replacement, or full soft-top restoration.

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99356192

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Porsche Hydraulic Drive Cylinder Cabriolet Roof | Reliable Roof Operation & Precision Engineering
The Hydraulic Drive Cylinder for Porsche 996 and 997 Cabriolet models is a crucial component in the convertible roof mechanism. It powers the smooth, synchronized opening and closing of your Porsche’s soft-top system, ensuring fluid motion and quiet operation every time you retract or raise the roof.

Fits:

• Porsche 996 C2 Cabriolet 3.4L 1997-08/01
• Porsche 996 C4 Cabriolet 3.4L 1997-08/01
  
• Porsche 996 C2 Cabriolet 3.6L 09/01-2005
  
• Porsche 996 C4 Cabriolet 3.6L 09/01-2005
  
• Porsche 996 C4S Cabriolet 3.6L 09/01-2005
  
• Porsche 996 TURBO Cabriolet 2000-05
  
• Porsche 997 MK1 Carrera Cabriolet 2 3.6L 2005-08
  
• Porsche 997 MK1 Carrera 2S Cabriolet 3.8L 2005-08
  
• Porsche 997 MK1 Carrera 4 Cabriolet 3.6L 2005-08
  
• Porsche 997 MK1 Carrera 4S Cabriolet 3.8L 2005-08
  
• Porsche 997 MK1 TURBO Cabriolet 2007-09
  
• Porsche 997 MKII Carrera C2 Cabriolet 3.6L 2009-12
  
• Porsche 997 MKII Carrera C4 Cabriolet 3.6L 2009-12
  
• Porsche 997 MKII Carrera C2S Cabriolet 3.8L 2009-12
  
• Porsche 997 MKII Carrera C4S Cabriolet 3.8L 2009-12
  
• Porsche 997 MKII Turbo Cabriolet 2010-13

Diagram ref no 12

At Design911, we supply high-quality hydraulic cylinders manufactured using advanced materials and precision seals, these cylinders are designed to withstand the hydraulic pressures and temperature variations encountered in everyday use.

Whether you’re restoring a Cabriolet roof system or replacing a leaking unit, this part ensures dependable operation and preserves your Porsche’s refined driving experience.

What Does a Hydraulic Drive Cylinder Do?
The hydraulic drive cylinder is responsible for powering the motion of your Porsche Cabriolet roof through hydraulic pressure.

Core Functions:

• Converts hydraulic fluid pressure into mechanical movement to raise or lower the roof.
• Ensures smooth, balanced motion between both roof sides.
• Maintains alignment and tension of the roof mechanism.
• Works in tandem with pumps, lines, and valves for seamless operation.

Without a functioning cylinder, the roof system cannot move properly, often resulting in uneven motion or complete failure.

Why Do Hydraulic Cylinders Fail or Leak?
Over time, wear, heat, and hydraulic pressure take their toll on the seals and internal components.

Common Causes of Failure Include:

• Hydraulic fluid leaks from worn or cracked seals.
• Contamination or debris damaging the internal piston.
• Age-related degradation of rubber components.
• Air ingress into the hydraulic system causing pressure loss.
• Corrosion or mechanical damage from extended use or storage.

When a cylinder fails, symptoms can include slow or jerky roof operation, fluid leaks in the rear compartment, or complete hydraulic system failure.

Why Replace Your Porsche Hydraulic Drive Cylinder?
Replacing your hydraulic drive cylinder restores full convertible roof functionality and protects the entire hydraulic system from strain or damage.

Key Benefits:

• Restores smooth, reliable Cabriolet roof operation.
• Prevents hydraulic leaks and loss of pressure.
• Protects pumps and lines from premature wear.
• Precision-engineered for Porsche 996 and 997 fitment.
• Manufactured using high-grade seals and corrosion-resistant materials.
• Designed to perform under high hydraulic load and temperature variation.

Replacing worn hydraulic cylinders ensures your roof operates as intended — with quiet, consistent, and leak-free performance.

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99756194502

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Hexagon-head bolt, M 14 x 1,5 x 120
The bolt connects the front tong shape arm to the cross member.
Sold each.

Fits:
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.2 Cayman 2009 - 2012
Porsche 997.2 Carrera 2009 - 2012
Porsche 997 Turbo 2007 - 2009
Porsche 997.2 Turbo 2010-2013
Porsche 997 GT3 2007 - 2011

Diagram ref no 7

Specifications:
• Thread: M14 × 1.5
• Length: 120 mm
• Head: Hexagon-head bolt
• Application: Front control arm / track-arm mounting

The front control arm mounting bolt is under significant load from braking, cornering and road surface irregularities. Over time, original bolts may become stressed, fatigued, corroded or incorrectly reused - leading to potential loosening, suspension misalignment or premature bushing/arm wear.

When to Replace:
• During front suspension removal or control arm replacement/re-bushing.
•  If the original bolt is corroded, thread-worn, stretched or has been reused many times.
•  When the car is being restored or upgraded, and you want to ensure correct hardware integrity.

Installing the correct bolt ensures factory-spec clamping force, correct alignment, and long-term reliability of the front suspension geometry.

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99907205001

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Control Arm Eccentric screw M 12 x 105. Rear Axle.
This is an eccentric adjustment screw used in the suspension system of Porsche 986 Boxster, 987 Boxster, and 987 Cayman models. This precision-engineered  replacement bolt provides the correct geometry and adjustment range for rear or front control arm alignment, allowing proper camber and toe settings.
Sold each.

Fits:
Porsche 986 Boxster 1997-04 F 98XS6 01536>>
Porsche 987 Boxster 2005 - 2008
Porsche 987 Cayman 2005 - 2008

Diagram ref no 12

• Function:  This bolt features an eccentric cam design that enables fine adjustment of suspension geometry. It’s critical for setting camber and toe angles, ensuring your Porsche tracks straight and maintains optimal tire contact for cornering grip and stability.

•  Why Replacement Matters: Over time, eccentric bolts can seize, corrode, or deform due to constant exposure to road conditions and torque load. When this happens, alignment accuracy suffers, and adjustment becomes difficult or impossible.

•  When to replaces: During suspension servicing or alignment work,  When replacing control arms or bushings, If the original bolt is frozen, bent, or corroded

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99633121705

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Hexagon head bolt front control arm, M14 x 1,5 x 95.
This bolt secures the front control arm (also known as the wishbone or track bar) to the chassis/frame or suspension assembly. The correct bolt ensures the arm remains fixed under load, maintains suspension geometry, and withstands vibration and stress  
Sold each - 2 required per car.

Fits:
Porsche 987 Boxster - 2005 to 2012
Porsche 987 Cayman - 2006 to 2012
Porsche 997 - 2005 to 2012
Porsche 997 turbo - 2007 to 2012
Porsche 997 GT3 - 2007 to 2011

Diagram ref no 11

Specification: M14 × 1.5 thread, length 95 mm
Replacement reference: 90037827909 → 90037827901

Control arm mounting bolts endure high forces from cornering, braking, and road irregularities. A bolt that’s worn, corroded, or reused may not hold correct torque or clamping force - compromising alignment and suspension performance.

When to Replace:
• During front suspension removal, control arm replacement or realignment.
• If the original bolt shows corrosion, thread damage, or distortion.
• As part of preventative maintenance on high-performance or heavily used vehicles.

Using a new bolt restores proper torque specification, secure mounting and ensures your Porsche’s suspension operates reliably and precisely.

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90037827901

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Gearbox silencer block Hexagon-head bolt. M12 x 1.5 x 100.
Engineered to match the original Porsche specification, this high-quality bolt ensures correct fit, strength, and finish for secure attachment of the gearbox silencer block on the Porsche 993 Carrera 2 .
Sold each.

Fits:
Porsche 993 C2 1994-98 MANUAL (Gearbox type G50.20 / G51.21)
Porsche 993 Carrera RS 1995 MANUAL (Gearbox type G50.31 / G50.32 / G50.33)
Porsche 993 C2 1994-98 TIPTRONIC (Gearbox type A50.04 / A50.05)

Diagram Ref No 15.

Bolts used in drivetrain and gearbox assemblies are exposed to continuous vibration, torque stress, and environmental factors such as heat and corrosion. Over time, these conditions can weaken or stretch the bolt, reducing its ability to maintain proper clamping force. Using a degraded or mismatched bolt can cause mounting misalignment, vibration, or even component failure under load.

When to replace:
• During gearbox or silencer block removal, when original bolts show corrosion, wear, or damaged threads.
•  As part of drivetrain servicing or restoration, ensuring all fasteners meet factory torque and material specifications.
•  Whenever hardware is reused or mismatched, to maintain the correct preload and structural integrity of the assembly.

Replacing this hexagon-head bolt guarantees the proper tensile strength, precise thread pitch, and corrosion resistance — restoring safe, vibration-free mounting performance in your Porsche 993 Carrera 2 or related 911 model.

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90037808801

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Brake caliper Hexagon-head bolt,  M12 X 1.5 X 40
Front or rear fixed caliper mounting bolt – used to secure the caliper to the mounting bracket or hub carrier. This high-quality hex-head bolt is designed for caliper mounting applications on Porsche vehicles, including the 924, 944 and 968 series. It matches the original specification (M12 × 1.5 × 40 mm)
Sold each.

Fits:
Porsche 924 S 1986 - 1988  FRONT CALIPER
Porsche 944 / 944 S 1982 - 1989 FRONT CALIPER
Porsche 944 TURBO 1985 - 1991 REAR CALIPER
Porsche 968 1992 - 1995 REAR CALIPER

Diagram ref no 10

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PCG0401081

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Front / Rear bumper hex nut, M8.
Hex nut for the front or rear bumper mounting assembly on Porsche 911 (1974–1989) models. Manufactured to match Porsche specifications, this M8 hex nut ensures accurate fitment, strong clamping force, and long-lasting durability for your bumper installation or restoration.
Sold Each.

Fits:
Porsche 911 G-models 1974 - 1989
Porsche 930 Turbo 3.0L, 3.3L 1975 - 1989

Diagram Ref No 15 (Front bumper) / no 22 (Rear bumper)

This hex nut fastens the bumper brackets and mounting hardware to the chassis structure. Its precise thread pitch and corrosion-resistant finish ensure consistent torque retention, reliable alignment, and vibration-free bumper support in all driving conditions.

Over time, moisture, vibration, and age can cause original hardware to rust, seize, or lose clamping strength. Aged nuts may compromise bumper alignment or make disassembly difficult during service or repainting.

When to Replace:
• During front or rear bumper removal, alignment, or restoration.
• If existing hardware is rusted, stripped, or corroded.
•  As part of preventive maintenance during bodywork or repainting.


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90008400402

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Complete Intake Connection Assembly.
Restore or upgrade the air intake plumbing on your classic Porsche 911 with this complete intake connection assembly. Designed for models with MFI/mechanical fuel injection, this intake pipe links the throttle/air-intake stack to the intake manifold, ensuring accurate airflow, reliable metering and correct fitment.
Sold Each.
x2 Required Per Car.
Fits Left And Right.

Fits:

• Porsche 911 1972-1973 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L

Diagram Ref No 12

What This Product Does:

• The intake pipe (or intake connection) is a critical component in the engine’s air delivery system: it connects the throttle body, intake stack or air intake system to the intake manifold of the engine.
• It ensures a smooth, sealed, correctly shaped passage of air (and in the case of injection, the air-fuel mixture) into the cylinder head, maintaining correct airflow, avoiding leaks or turbulence that could upset fuel/air metering or engine response.
• On the era of 911 referenced (MFI mechanical fuel injection), proper intake piping is important for correct function of the injection system, throttle response, and overall engine performance.

Symptoms Of Wear, Damage Or When Replacement Matters:

• Air leaks or a hissing sound around the intake pipe, which can upset the injection/air-metering system, cause poor running, unstable idle or reduced performance.
  
• Poor throttle response, hesitation or mis-firing — if the pipe is cracked, partially blocked, or has missing components, it can degrade engine performance.
  
• Cracks, corrosion, or broken mounting tabs visible on the pipe or its flanges — especially for older vehicles where plastic/metal parts have aged.
  
• Difficulty fitting or aligning connections between the throttle stack and manifold — if the pipe is out of shape or damaged, it may be difficult to achieve correct installation or clean sealing.
  
  

Why Replacement Matters:

• Ensures correct airflow and engine performance: A damaged or sub-standard intake pipe can compromise air delivery, disrupt mixture control, and reduce engine efficiency or driveability.
  
• Improves reliability: Old or worn intake components can lead to leaks, performance issues or even engine damage (if mixture is upset or induction temperatures become erratic). Replacing with a correct part restores the system.
  
• Simplifies installation: Buying a “complete” intake connection (rather than patching multiple smaller pieces) saves installation time, reduces risk of missing parts, and ensures compatibility.
• Ensures fitment integrity: In older vehicles, mounting points may have degraded—installing a new pipe with correct flanges/hardware ensures everything aligns properly, reducing stress or potential leaks.

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91111006302

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Cotter pin nut for wishbone ball joint front.
Designed for the front wishbone (control arm) ball joint. Engineered to original Porsche specifications, this nut ensures safe, reliable fastening of the lower ball joint to the suspension arm on Porsche 911 and 914  models.
Sold each. Fits left and right.

Fits:
Porsche 911 1969 - 1989
Porsche 914 1972 - 1976

Diagram ref no 22

The cotter pin nut fastens the lower ball joint to the front suspension arm and secures it with a locking cotter pin through the castle slots. This prevents the nut from rotating loose, maintaining safe steering and suspension geometry during operation.

Over time, nuts can wear, corrode, or lose torque retention due to repeated assembly, age, or exposure to moisture and road debris. A weakened or reused nut may compromise the ball joint’s security, leading to excessive play or unsafe suspension movement.

When to Replace:
• During front suspension rebuilds or ball joint replacement.
• If the original nut is rusted, damaged, or has distorted threads.
• Whenever the cotter pin is replaced, ensuring proper torque and locking function.

Replacing a new cotter pin nut restores factory-level safety, alignment integrity, and reliability in your classic Porsche’s suspension system.

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Number plate holder / license plate screw.
This screw is ideal for both front and rear plate mounting, providing secure retention without damaging the bumper or bracket. Designed to the same dimensions and finish as the factory fasteners, it ensures a perfect fit and clean, original appearance for Porsche 964, 993, 996, and 986 Boxster models.
Sold each.

Fits:
Porsche 964 1989 - 1994
Porsche 993 1995 - 1998
Porsche 996 1998 - 2004
Porsche 986 Boxster 1997 - 2004

Diagram ref no 23.

Over time, exposure to moisture, dirt, and road salts can cause number plate screws to corrode, seize, or strip their threads, making them difficult to remove or reinstall.

When to replace:
•  When refitting or replacing number plate brackets.
•  If the original screws are rusted, damaged, or missing.
•  During restoration or bumper replacement to preserve factory-correct detailing.

Installing new screws guarantees a perfect fit, clean finish, and long-lasting corrosion resistance, keeping your Porsche’s license plate securely and neatly mounted.

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